Researcher Database

Futoshi Nakamura
Research Faculty of Agriculture Fundamental AgriScience Research Forest Science

Researcher Profile and Settings


  • Research Faculty of Agriculture Fundamental AgriScience Research Forest Science

Job Title

  • Professor


J-Global ID

Research Interests

  • Ecosystem Management   Landscape Ecology   Stream Ecology   

Research Areas

  • Life sciences / Forest science
  • Life sciences / Ecology and environmental science

Academic & Professional Experience

  • 2006 - Today - 大学院農学研究院環境資源学専攻森林管理保全学講座森林生態系管理学分野教授 教授
  • 2000 - 2006 大学院農学研究科環境資源学専攻森林管理保全学講座森林施業計画学分野教授 教授
  • 2000 - 2006 Professor
  • 2006 - Professor
  • 1992 - 2000 大学院農学研究科環境資源学専攻森林管理保全学講座砂防学分野助教授 助教授
  • 1992 - 2000 Associate Professor
  • 1990 - 1992 オレゴン州立大学林学部森林科学科 客員Assistant Professor
  • 1989 - 1992 大学院農学研究科林学専攻砂防学講座講師 講師
  • 1989 - 1992 Lecturer
  • 1984 - 1989 農学部林学科砂防工学講座助手 助手
  • 1984 - 1989 Research Associate


  • 1987 -   農学博士(論文)
  •        - 1984  Hokkaido University
  •        - 1984  Hokkaido University  Graduate School, Division of Agriculture
  • 1981 - 1983  Hokkaido University
  •        - 1983  Hokkaido University  Graduate School, Division of Agriculture
  • 1977 - 1981  Hokkaido University  Faculty of Agriculture
  •        - 1981  Hokkaido University  Faculty of Agriculture

Association Memberships

  • Landscape and Ecological Engineering   日本学術会議研究連絡委員会委員(森林工学研究連絡委員会   応用生態工学会   日本森林学会   THE ECOLOGICAL SOCIETY OF JAPAN   

Research Activities

Published Papers

  • 川の自然再生
    中村 太士
    国立公園 712 15 - 18 0466-3934 2013/04 [Not refereed][Not invited]
  • 日本の山と川の変貌、そして未来への展望
    中村 太士
    開発こうほう (593) 14 - 19 2012/12 [Refereed][Not invited]
  • 川の蛇行復元-曲がった川のもつ意味
    中村 太士
    科学 82 (11) 1241 - 1245 2012/11 [Refereed][Not invited]
  • 中村 太士
    ワイルドライフ・フォーラム 野生生物保護学会 17 (1) 1341-8785 2012/07 [Refereed][Not invited]
  • 中村 太士
    山林 大日本山林会 0 (1537) 2 - 11 0487-2150 2012/06 [Not refereed][Not invited]
  • Nobuo Ishiyama, Shigeya Nagayama, Takumi Akasaka, Futoshi Nakamura
    HYDROBIOLOGIA 686 (1) 257 - 266 0018-8158 2012/05 [Refereed][Not invited]
    The Japanese crayfish (Cambaroides japonicus), the only native crayfish in Japan, is endangered and has experienced rapid population declines. We surveyed the habitat requirements of Japanese crayfish at the reach and microhabitat scales in semi-natural low-gradient streams. Habitat use by Japanese crayfish differed between the spatial scales. Reach-scale analysis revealed that the bed slope was the only positive predictor of crayfish density. This finding indicates that relatively high-gradient reaches, such as headwater reaches, are an important habitat for the conservation of Japanese crayfish in low-gradient streams. Microhabitat-scale analysis showed that crayfish density was positively affected by substrate coarseness and the presence of instream vegetation cover (bank vegetation, woody debris, and leaf patches), whereas it was negatively affected by distance from the stream edge. Coarse substrates and vegetation cover may function as shelters from water flows and predators during low flow periods. The use of stream-edge areas may allow quick access to refugia and enable the crayfish to avoid unexpected flood disturbance and predation. These habitat characteristics should therefore be preserved for the conservation of Japanese crayfish, and scale-dependent habitat characteristics should be considered in future conservation plans.
  • Futoshi Nakamura, Nao Fuke, Mayumi Kubo
    PLANT ECOLOGY 213 (5) 735 - 747 1385-0237 2012/05 [Refereed][Not invited]
    The purpose of this study was to examine the effects of large wood (LW) on the physical environment and the initial establishment of vascular plant species in the Rekifune River, a large bar-braided monsoonal river in Japan. The physical environment and the diversity and composition of plant species were compared in relation to the orientation of LW pieces. We found that shading effects were more prevalent in the immediate vicinity of LW pieces than in quadrats distant from LW. The effect was especially strong at the center of LW jams (the "jam center"). Fine sand and silt were concentrated in the quadrats downstream from the LW pieces. In contrast, cobbles dominated the upstream quadrats. The highest diversity was found in the jam center, while intermediate values were observed in the quadrats surrounding LW. Indicator species analysis detected 21 indicator species only in the jam center. The LW jams favored the deposition of plant fragments and sediment and created shaded areas within and around the structures. Buried seeds may be transported with LW during a flood, and seeds dispersed by wind and stream flows may be trapped by the complex structure of LW jams. The specific environmental conditions and the trapping of seeds and plant fragments result in the early establishment of mid-successional tree species at LW jams. In conclusion, the LW pieces deposited on gravel bars altered the light and substrate conditions and thereby provided specific safe sites for various riparian plant species.
  • Yasunori Nakagawa, Takatoshi Nakamura, Hiroyuki Yamada, Futoshi Nakamura
    LIMNOLOGY 13 (1) 27 - 36 1439-8621 2012/04 [Refereed][Not invited]
    As part of the Kushiro Wetland Restoration Project, we evaluated the effect of the tree-cutting (February 2003) on soil water chemistry for 3 years in an alder (Alnus japonica) shrubland on the peat soil in the Kushiro Wetland, the largest wetland in Japan. The alder stand was divided into two types; low stature and high stature stands, mean heights being 1.5 and 2.6 m, respectively. The treatment plot with tree cutting and the reference plot measuring 25 m x 25 m each were established in both stands, and a soil incubation experiment was also conducted by trenching the root zone of wetland vegetation in the treatment plots in both stands in the summer of 2004. The tree cutting did not substantially increase the concentrations of ammonium ion (NH4 (+)) and nitrate ion (NO3 (-)) in the soil water, although a gradual and slight increase of NO3 (-) concentration was found after the tree-cutting only in the high stature stand (< 10 mu mol/l). This increase in the NO3 (-) concentration in the high stature stand was probably due to the rhizosphere oxidation of wetland herbaceous vegetation, and was accompanied by the increase of Ca2+ concentration. The soil incubation experiment showed no significant change of the nitrogen concentration, suggesting that inorganic nitrogen was immobilized and NO3 (-) was denitrified intensively in this wetland peat soil. The results of this study suggested that this wetland ecosystem had a high potential to stabilize the soil water chemistry.
  • Jung Il Seo, Futoshi Nakamura, Takumi Akasaka, Hidetaka Ichiyanagi, Kun Woo Chun
    WATER RESOURCES RESEARCH 48 (48) 0043-1397 2012/03 [Refereed][Not invited]
    We examined the relationships between large wood (LW) export and precipitation patterns and intensity by analyzing the data on the annual volume of LW removed from 42 reservoirs and the daily precipitation at or near the reservoir sites. We also calculated the effective precipitation by considering the antecedent precipitation. Both daily and effective precipitation data were used as explanatory variables to explain LW export. The model selection revealed that the precipitation pattern and intensity controlling LW export varied with latitude in the Japanese archipelago. In small watersheds with narrow channel widths and low discharges, mass movements, such as landslides and debris flows, are major factors in the production and transport of LW. In this case, the effective precipitation required to initiate mass movements regulated the LW export and did not vary with the latitude. In intermediate and large watersheds with wide channel widths and high stream discharges, heavy rainfall and subsequent floods regulated buoyant depth, influencing the initiation of LW movement. In southern and central Japan, intense rainfall accompanied by typhoons or localized torrential downpours causes geomorphic disturbances, which introduce abundant pieces of LW into the channels. However, these pieces continue to be removed by repeated rainfall events. Therefore, LW export is supply-limited and potentially produces less LW accumulation. Conversely, in northern Japan, where typhoons and torrential downpours are rare, LW export is transport-limited because LW pieces recruited by bank erosion, tree mortality, and windthrow accumulate and persist on valley floors. These pieces may be easily exported by infrequent flooding.
  • 河川生態系の変貌と生物多様性-劣化プロセスと再生への新たな視点-
    中村 太士
    地質と調査 (1) 29 - 36 2012 [Refereed][Not invited]
  • Takumi Akasaka, Munemitsu Akasaka, Futoshi Nakamura
    BIOLOGICAL CONSERVATION 145 (1) 15 - 23 0006-3207 2012/01 [Refereed][Not invited]
    Conserving biodiversity in agricultural landscapes is an urgent issue. The effective conservation of biodiversity requires plans based on species' habitat preferences at multiple spatial scales. We examined how the foraging habitat selection of bats varied with grain size (50,150,250, and 350 m)and how habitat selection in the home range differed from that in the foraging habitat in an agricultural landscape. Focusing on three sympatric Myotis species (Myotis petax, Myotis gracilis, and Myotis frater), we radio-tracked 10 individuals of each species for 121 nights in Hokkaido, northern Japan. Rivers and broadleaved riparian forests were commonly preferred at multiple scales, although the preferred land-cover type was dependent on both extent and grain size for most species. The best grain sizes for predicting the foraging-habitat use of M. petax and M. gracilis were 50 and 150 m. By contrast, M.frater showed no tendency across the grain sizes. Our results indicate that it is necessary to consider both extent and grain size to understand the habitat selection of bats. Our findings also suggest that focusing primarily on preferred land-cover types at multiple scales is effective for conservation planning, given the limited resources in terms of time, manpower, and finances. Although arable did not negatively affect the selection of foraging habitats and home ranges in these bat species, preventing the loss of rivers and forests should be prioritized over preventing arable land expansion. (c) 2011 Elsevier Ltd. All rights reserved.
  • 森谷 佳晃, 森本 未星, 森本 淳子, 中村 太士
    日本森林学会誌 94 (1) 10 - 16 1349-8509 2012 [Refereed][Not invited]
  • 自然再生事業の未来像.
    河川 10 (795) 3 - 5 2012 [Not refereed][Not invited]
  • Shigeya Nagayama, Futoshi Nakamura, Yoichi Kawaguchi, Daisuke Nakano
    HYDROBIOLOGIA 680 (1) 159 - 170 0018-8158 2012/01 [Refereed][Not invited]
    This study examined the effects of the configuration of wood structures on the use of local autumn and winter habitats by fish in a remeandering reach of a large lowland river. Fish diversity was higher at the simple wood-structure (SWS) and the log-jam (LJ) sites than at the no-wood (NW) sites during both seasons. In particular, the diversity at the LJ sites was higher than that at the SWS sites during the winter. The abundance of the four dominant fish species was generally higher at the LJ sites than at the NW sites during both seasons. The SWS and LJ sites were characterized by greater depths, finer bed materials, and more diverse flow conditions during the autumn. During the winter, the LJ sites were characterized by slower currents and finer bed materials. These habitat features satisfied the various habitat requirements of the fish observed in our study reach; during the autumn, areas with fast and slow currents were favorable for juvenile salmon, silt and sand bed materials for lamprey, and deep areas for one species of goby, while slow currents were critical in the winter for abovementioned fish species. Engineered log jams were also effective in supporting the colonization of fish during both seasons. These findings suggest that a larger and more complex wood structure, particularly log jams, plays important roles in creating local habitats suitable for various fish species during the autumn and winter and in preserving fish abundance and diversity in large lowland rivers.
  • YAMANAKA Satoshi, AKASAKA Takumi, NAKAMURA Futoshi
    Honyurui Kagaku (Mammalian Science) 日本哺乳類学会 51 (2) 265 - 275 0385-437X 2012 [Refereed][Not invited]
  • Yuichiro Shida, Futoshi Nakamura
    PLANT ECOLOGY 212 (11) 1819 - 1829 1385-0237 2011/11 [Refereed][Not invited]
    In this article, we focused on hummocky microtopography as a prominent feature of mires and explored the microenvironmental conditions suitable for alder seedling establishment. Japanese alder (Alnus japonica) forest is widely distributed in wetlands in northern Japan. However, because alder seedlings are rare in mires, alder population dynamics and conditions that favor the establishment of alder seedlings are still unknown. The study was conducted in northern Japan at a site in mesotrophic mire. We surveyed the seedling density, the microenvironmental conditions (light, litter cover, and soil quality), and the density of dispersed seeds in alder forest and in the adjacent herbaceous fen. In addition, we performed a laboratory experiment to examine the germination characteristics of alder. Seedlings grew only on hummocks in alder forest. The percentage of litter cover on hummocks was lower than in hollows, and the density of dispersed seeds in alder forest was much higher than in herbaceous fen. Seeds of Japanese alder germinated under both light and dark conditions, and the germination rate were high under light and high-temperature conditions. Our results suggest that litter cover may inhibit seedling establishment and hummocks that characterized by less litter cover are suitable place for the establishment of seedlings. We conclude that hummocky microtopography and abundant seed rain in the mire enable the establishment of Japanese alder seedlings.
  • Koji Katagiri, Kazuo Yabe, Futoshi Nakamura, Yoshifumi Sakurai
    LIMNOLOGY 12 (2) 175 - 185 1439-8621 2011/08 [Refereed][Not invited]
    To identify the causes of the rapid expansion of the semi-emergent Phalaris arundinacea L. community in a nutrient-loaded river, we investigated the factors that determine the distribution of the Phalaris and other aquatic macrophyte communities and the shoot growth of P. arundinacea. The Phalaris community was distributed through areas with high organic nitrogen (Org-N), total phosphorus (T-P), PO(4)-P and suspended solids (SS) concentrations and low dissolved oxygen (DO). P. arundinacea shoots grow better in deep mud and high SS and T-P, all of which were strongly correlated with slower stream currents. Accordingly, although the concentration of total nitrogen constantly increased from 1985 to 1998, the determining nutrient for the expansion of the Phalaris community and P. arundinacea shoot growth stimulation was phosphorus rather than nitrogen. The Phalaris community increased rapidly between 1991 and 1996, when brief but prominent loadings of phosphorus were observed. We concluded that the Phalaris community was restricted due to phosphorus deficiency under nitrogen excess until 1991 and subsequently rapidly expanded over the channel due to the temporary excess phosphorus present during this period. Thereafter, the rapid expansion of the Phalaris community was maintained by the clogging effect of the floating mats formed by shoots and their remains of P. arundinacea, which results in slower currents. A slower current resulted in low DO, the sedimentation of degraded plant remains (high Org-N), and the adsorption of phosphorus by suspended matter (high SS and T-P). The anaerobic conditions caused by low oxygen and the accumulation of decomposable organic matter ensure the continuous development of the Phalaris community through the release of soluble phosphorus from the sediment.
  • Junko Morimoto, Miho Morimoto, Futoshi Nakamura
    FOREST ECOLOGY AND MANAGEMENT 261 (8) 1353 - 1361 0378-1127 2011/04 [Refereed][Not invited]
    All or a part of a sequence of forest practices (i.e., salvage logging, site preparation, planting crop trees, and weeding) has been implemented after natural disturbances for the rapid re-establishment of tree cover. Forest policies in Japan have recently changed from monocultural planting of coniferous crop trees to planting native broadleaved trees to restore forests and nurture local biodiversity following large windthrows. However, the effects of this new practice on preserving biodiversity, as well as the effects of legacy retention, have never been verified in Asia. Thus, the objective of our research was to compare the effects of legacy retention with plantation after salvaging on the initial stage of vegetation recovery in a blowdown area, specifically focusing on plant species diversity, the occurrence of alien species, and the composition of plant species. Following the analysis of our results, we finally describe appropriate practices to alter disturbed coniferous plantations to bring the species composition closer to that of the original natural mixed forests. A control (A, legacy retention) and three experimental treatment sites (B, salvage logged, site prepared, and Quercus crispula seedlings planted; C, same as B, but weeded once during the summer; and D, residual rows that emerged after establishing sites for planting) were prepared, and quadrats were set. Eleven indicators of the ground condition and the number of vascular plant species, including ferns, were quantified, and the number and abundance of residual and newly colonized plants of the main woody species were estimated. Our main findings were as follows: (1) in unsalvaged sites and residual rows, the diversity of plant species was poor, but a variety of plant species compositions were observed due to the heterogeneous conditions of the ground and ample residual plants; (2) in the planting site, many species appeared, but little variety of the species composition was observed due to the homogeneous condition of the ground and the destruction of residual plants; (3) a large number of alien species emerged in broad, unvegetated areas; (4) the impact of site preparation overwhelmed the impact of salvage logging on the initial recovery of plant species; and (5) to restore a natural mixed forest, a combination of legacy retention and plantation after salvaging would be the most appropriate. (C) 2011 Elsevier B.V. All rights reserved.
  • 中村 太士
    水利科学 日本治山治水協会 (322) 68 - 81 0039-4858 2011 [Refereed][Not invited]
  • Mayumi Takahashi, Futoshi Nakamura
    LANDSCAPE AND ECOLOGICAL ENGINEERING 7 (1) 65 - 77 1860-1871 2011/01 [Refereed][Not invited]
    We examined the impacts of the Satsunai River Dam on the hydrology and development of riparian vegetation along the upper and lower reaches of the Satsunai River downstream from the dam. We estimated frequency curves of the flood discharge during the pre-dam (1976-1996) and post-dam (1997-2006) periods and simulated the flood frequency at sampling points within sites under pre-dam, post-dam and dam-removal (using the pre-dam flood discharge and post-dam cross-sections) scenarios. Changes in channel morphology and land cover were investigated by analyzing aerial photographs. Our results indicate that the 20-year flood at the upper site decreased substantially (from 599 to 271 m(3)/s) after dam operation, while that of the lower site decreased slightly (from 1025 to 977 m(3)/s). Within the upper site, the proportion of > 20-year return periods increased considerably (from 31.0 to 48.6%) while the proportion of 1- to 20-year return periods decreased (from 30.5 to 8.9%) after dam operation. Flood frequency results for the dam-removal scenario were similar to those for the pre-dam period, suggesting that a return to pre-dam discharge rates would restore the pre-dam distribution of flood frequency at the upper site. Within the lower site, however, the distribution of flood frequency varied little between the pre- and post-dam scenarios, because tributary inflows between the sites mitigated the impacts of dam-regulated flows. Land cover types were associated with flood frequency at both sites. The reduced flood frequency of the upper site resulted in increased area of riparian vegetation and decreased area of active channel.
  • Jung Il Seo, Futoshi Nakamura, Kun Woo Chun
    LANDSCAPE AND ECOLOGICAL ENGINEERING 6 (2) 271 - 287 1860-1871 2010/07 [Refereed][Not invited]
    Recent research has elucidated the positive ecological roles of large wood (LW) in fish-bearing channels. However, where logjams increase local flooding and bank erosion, LW has negative impacts on public safety and property protection. Although our understanding of reach-scale processes and patterns has increased dramatically in recent years, only a few studies have integrated this knowledge at the watershed scale. Here we review variations in LW dynamics along a gradient of watershed sizes. In small watersheds, a massive amount of LW, resulting from forest dynamics and hillslope processes, remains on the valley floor. These pieces may persist for several decades and are eventually transported during debris flows. In intermediate watersheds, LW is dominantly recruited by bank erosion from adjacent riparian areas. These pieces are continuously transported downstream with LW pieces that are supplied from the upstream watershed by floods because these channels have a greater width and depth than the length and diameter of the pieces, as well as a high stream power. This leads to fragmentation of the LW pieces, which increases their transportability. In large watersheds, LW pieces are frequently recruited at locations where the channel is adjacent to riparian forests. Floated LW pieces can accumulate along channels with wide floodplains. Storage in floodplains can lead to more rapid decay than in an anaerobic environment, resulting in the subsequent removal of LW pieces from the system. Our review presents a generalized view of LW processing at the watershed scale, and is relevant to ecosystem management, disaster prevention and the identification of knowledge gaps.
  • Shigeya Nagayama, Futoshi Nakamura
    LANDSCAPE AND ECOLOGICAL ENGINEERING 6 (2) 289 - 305 1860-1871 2010/07 [Refereed][Not invited]
    To provide river managers and researchers with practical knowledge about fish rehabilitation, various studies of fish habitat rehabilitation that used wood were reviewed. The review focuses on fish responses, wood installation methods, and geomorphic features of the rehabilitation sites. Most studies were conducted in moderately sized (small and medium) streams with relatively high bed gradients and aimed to improve the habitats of salmonid species. In this stream type, structures spanning the full (log dam) and partial (log deflector) width of the river were most common, and wood structures that created pools and covers were successful in improving fish habitat. Some projects were conducted in moderately sized low-gradient streams, in which wooden devices used to create instream cover were effective for fish assemblages. There were few studies in other aquatic ecosystems. However, well-designed large wood structures, known as engineered log jams, were used in rehabilitation projects for large rivers. In slack-water or lentic systems such as side-channels, estuaries, and reservoirs, small and large wood structures that created cover were used to improve habitat for many fish species. For successful fish habitat rehabilitation projects, the hydrogeomorphic conditions of rehabilitation sites should be carefully examined to avoid physical failure of wood structures. Although artificial wood structures can be used to improve fish habitat in various aquatic ecosystems, they should be considered to be a complementary or interim habitat enhancement technique. The recovery of natural dynamic processes at the watershed scale is the ultimate target of restoration programs.
  • Alexander K. Fremier, Jung Il Seo, Futoshi Nakamura
    GEOMORPHOLOGY 117 (1-2) 33 - 43 0169-555X 2010/04 [Refereed][Not invited]
    Large wood maintains in-channel and floodplain habitats by influencing the biophysical character of the river corridor. Large wood dynamics in a river corridor are a product of watershed wide processes and also of local recruitment, transport, and storage. This complexity of scales added to the logistical constraints in taking measurements limits our understanding of large wood dynamics through the watershed. To begin to unravel this issue, we compiled a data set of the volume of large wood deposited annually into 131 reservoirs across Japan and compared large wood export to flow discharge and watershed characteristics (watershed size, latitude, channel slope, percent forest, and forest type). We found that large wood was predominately transported during peak flow events. Large wood export increased logarithmically with watershed area. The decreasing export rate of large wood per watershed area is interpreted as a combination of annual export variability in upper watersheds, a non-significant increase in large wood recruitment along the longitudinal gradient (potentially human influenced), the increase in long-term storage on adjacent large floodplains, and significant decay/fragmentation downstream. Watersheds<10-20 km(2) had a highly variable large wood export pattern, conforming generally to previously published work that suggest transport limitation in smaller watersheds. The data suggest the existence of an export threshold (similar to 75 km(2)) where large wood export is no longer related to watershed size. Export across all watershed sizes was controlled by watershed characteristics (slope, percent forested, etc.) and peak discharge events. The connection with upstream watersheds and laterally with the floodplain increases the net flux of large wood through downstream transport and retransport of buried logs. Identifying rates of large wood transport from watershed connectivity as a potential key input process will improve our basic understanding of geomorphic and ecological patterns within the watershed. These results highlight the importance of understanding the local-and watershed-scale dynamics of large wood in creating and maintaining more heterogeneous riparian and aquatic habitat along the river corridor. Published by Elsevier B.V.
  • 標津川における河川生態学術研究の取り組みと成果
    中村太士, 小川豪司
    RIVERFRONT (69) 2 - 5 2010 [Not refereed][Not invited]
  • 釧路川そして釧路湿原の再生−これまでの進展と今後の課題−
    FRONT MOOK (5) 48 - 51 2010 [Not refereed][Not invited]
  • 河川生態系を蘇らせる新たな視点.
    河川 3 (776) 11 - 17 2010 [Not refereed][Not invited]
  • 人口減少社会における防災と自然環境の保全.
    月刊建設 9 (55) 4 - 5 2010 [Not refereed][Not invited]
  • Nakamura, F, Komiyama, E
    Landscape and Ecological Engineering (6) 143 - 152 2010 [Refereed][Not invited]
  • 海と川と陸のつながりを復元する−知床からの報告−.
    環境研究 (158) 120 - 128 2010 [Refereed][Not invited]
  • 中村 太士
    水文・水資源学会誌 23 (1) 1 - 2 0915-1389 2010/01 [Refereed][Not invited]
  • 永美暢久, 矢部和夫, 中村太士
    JAPANESE JOURNAL OF CONSERVATION ECOLOGY 15 29 - 38 2010 [Refereed][Not invited]
  • Young Sang Ahn, Futoshi Nakamura, Kun Woo Chun
    GEOMORPHOLOGY 114 (3) 284 - 293 0169-555X 2010/01 [Refereed][Not invited]
    Sediment dynamics for the last 300 years in Lake Toro and the applicability of Pb-210 dating (CIC and CRS models) are evaluated. The lake sedimentation and sediment yield were determined by Cs-137 (in 1963) and two tephra layers (Ko-c2 in 1694 and Ta-a in 1739). The average sediment yields for initial development periods of catchments were 13.0-14.1 t km(-2) yr(-1) until 1963 and increased to 30.5 t km(-2) yr(-1) after 1963 because of the conversion of floodplain and upland forests to cultivated lands. In particular, the western zone of the lake near the conjunction with the Kushiro River had a high sedimentation rate, which is attributable to sediment inflow back from the Kushiro River during floods. The CIC model was not applicable because of fluctuations in the Pb-210 profiles since 1963. The CRS model agrees with the Cs-137 dating in all sites except for one site close to the Kushiro River inflow. Pb-210 dating may contain considerable errors where the Pb-210 concentration profile and flux are perturbed by floodwater from the Kushiro River, which contains low levels of Pb-210. (C) 2009 Elsevier B.V. All rights reserved.
  • Masao Himura, Koji Nishi, Futoshi Nakamura, Kiwamu Kawaguchi, Takaaki Torit, Yoko Takeuchi, Masatoshi Nishikawa, Hitomi Godo, Shinichiro Tate, Yasusuke Kurosaki, Marie Murakami
    Ecology and Civil Engineering 応用生態工学会 13 (1) 9 - 23 1882-5974 2010 [Refereed][Not invited]
    The purpose of this study is to verify the validity of the habitat assessment based on physical environments using biological community data in middle reaches of the Shibetsu River, eastern Hokkaido, Japan. We surveyed biological assemblages (fish, benthic invertebrates, terrestrial plants and birds) at 16 sites in the study reaches and examined relationships between the physical assessment results (DDR: the degree of departure in physical conditions from reference sites) and biological data: 1) abundance or diversity of species that are typical in pristine environment of the study reaches and 2) community compositions. The community compositions were analyzed by the Detrended Correspondence Analysis (DCA) ordination. Abundances of the typical fish and plant species were high in the sites that were evaluated as ‘good’ by the physical habitat assessment, whereas they were low in those as ‘degraded’. The first axis of DCA showed a gradient in species composition reflecting anthropogenic influences and correlated with DDR and many physical variables in fish, benthic invertebrate and terrestrial plant communities. The main DCA axes showed no relationship with DDR and few relationships with physical variables in bird communities. Our results showed that the habitat assessment method using the degree of departure in physical conditions from reference sites was an effective tool for comprehensive river habitat assessment. © 2010, Ecology and Civil Engineering Society. All rights reserved.
  • Hisashi Miya, Toshiya Yoshida, Mahoko Noguchi, Futoshi Nakamura
    JOURNAL OF FOREST RESEARCH 14 (5) 302 - 310 1341-6979 2009/10 [Refereed][Not invited]
    We analyzed temporal patterns in diameter growth of saplings following selection harvesting in an uneven-aged mixed stand dominated by Abies sachalinensis, Acer mono, Quercus crispula, and Betula ermanii in Hokkaido, northern Japan. We examined interspecific differences in growth responses to local growing conditions including harvesting intensity, crowding, stem size, and past duration of the small growth period. Consistent with expectations based on shade tolerance of the species, the age at which the individual reached a diameter at breast height (DBH) of 12.5 cm was highest for A. sachalinensis and lowest for B. ermanii. The interspecific growth differences between saplings that had or had not experienced local harvesting increased gradually for A. sachalinensis and B. ermanii, but peaked at around 4-6 years after harvesting for Q. crispula. Generalized linear mixed model analysis clearly suggested that individual growth conditions required to enhance diameter growth of saplings differed considerably among species. For Q. crispula and B. ermanii, local harvesting intensity was most strongly and positively associated with diameter growth rate, whereas for A. sachalinensis and A. mono, stem size had the strongest negative effect. Abies sachalinensis saplings responded more to surrounding harvesting when they were relatively small, whereas A. mono showed a weak opposite response. The duration of the small growth period before harvesting had negative effect for A. sachalinensis, but not for the other species. Our study indicated that the influence of selection harvesting on growth of shade-tolerant species depends upon pre- and post-harvest growing conditions.
  • Young Sang Ahn, Futoshi Nakamura, Toshikazu Kizuka, Yugo Nakamura
    EARTH SURFACE PROCESSES AND LANDFORMS 34 (12) 1650 - 1660 0197-9337 2009/09 [Refereed][Not invited]
    The purpose of this study was to examine the historical change in sedimentation rates in lakes that have been impacted by river regulation and agricultural activities in the Ishikari River floodplain. We dated sediment cores using caesium-137 (Cs-137) dating and tephrochronology, and we estimated sediment sources from Cs-137 concentrations in the topsoil of representative land covers. We found that, between 1739 and 1963, the distance between the lake and the main river channel and whether or not the lake was connected to the river affected the sedimentation rates. After 1963, agricultural drainage systems were established in the Ishikari River floodplain. The average sedimentation rate before and after the construction of drainage ditches varied between 1-66 and 87-301 mg cm(-2) a(-1), respectively. The increase in the sedimentation rate after 1963 was caused by the construction of a number of drainage networks, as well as extensive cultivation activity and/or fragmentation of the swamp buffers surrounding the lakes. The Cs-137 activities at the surfaces of the lake as well as the catchment-derived Cs-137 contributions and Cs-137 inventory in the lake profiles were used to examine the sediment influx from the various drainage areas after the establishment of the drainage system. Our results indicate that the majority of the lake sediments were derived from cultivated areas, and therefore the catchment-derived Cs-137 contribution in the lakes was strongly correlated with the sedimentation rate. The Cs-137 inventory across all of the lake profiles was also significantly greater than the atmospheric fallout. We identified a negative correlation between the Cs-137 lake profile inventory and the sedimentation rate. This is because the sediment originating from the drainage areas contained low Cs-137 concentrations, which diluted the overall concentration of Cs-137 in the lake sediment. Copyright (C) 2009 John Wiley & Sons, Ltd.
  • Yuichiro Shida, Futoshi Nakamura, Hiroyuki Yamada, Takatoshi Nakamura, Nobuhiko Yoshimura, Masami Kaneko
    WETLANDS 29 (3) 988 - 996 0277-5212 2009/09 [Refereed][Not invited]
    We examined factors that influence the expansion of alder forests in a wetland isolated by dikes and drainage ditches in northern Japan. Using aerial photographs, airborne laser scanner data, and existing elevation data, we described the spatial distribution and heights of alder forest in 2002 and the spatial distribution in 1977. We also measured water level and water quality in 2002. The mean water level was slightly lower than the ground surface, and water level fluctuation was minimal. The study site was mesotrophic, but salt concentration was high. The alder forest expanded around the area adjacent to the alder forests present in 1977, and the canopy cover ratio increased over a wide area. A generalized linear model suggested that water level and quality and the previous distribution of reproductively mature trees controlled the expansion pattern of the alder forest. A decrease in water level fluctuation promoted initial establishment, while an increase in fluctuation promoted height growth. A decrease in salt concentration or acidity promoted both initial establishment and growth. Flood protection by dikes may change spatial distribution of alder trees by narrowing water level fluctuation, restricting fruit dispersal, and reducing tree mortality.
  • Takumi Akasaka, Daisuke Nakano, Futoshi Nakamura
    BIOLOGICAL CONSERVATION 142 (7) 1302 - 1310 0006-3207 2009/07 [Refereed][Not invited]
    To conserve the foraging habitat of Daubenton's bat (Myotis daubentonii) in a large lowland river, we investigated the influence on this bat of prey variables (number or biomass) and insect origin (aquatic or terrestrial). We tested the hypothesis that river restoration (re-meandering) conducted in the Shibetsu River, northern Japan, enhances foraging habitat quality by increasing the abundance of aquatic insects. From June to September 2004, flying insects were collected using Malaise traps in restored and channelised reaches in the Shibetsu River. Bat activity was recorded by bat detectors placed near the Malaise traps in each of the two reaches. Foraging activity of Daubenton's bat was more strongly related to the number of insects than to biomass, and to adult aquatic insects than to terrestrial insects. The high dependence of Daubenton's bat on aquatic prey was attributed to the fact that aquatic insect numbers were always higher than those of terrestrial insects. Contrary to the hypothesis, Daubenton's bat was more active in the channelised reach than the restored reach in all months except June, and it synchronized its foraging activity with the seasonal distribution of adult aquatic insects. However, the study was undertaken just two years after restoration and the riparian vegetation had not yet established itself Our results demonstrate the importance of aquatic insect abundance for Daubenton's bat throughout the seasons in large lowland rivers. A further decrease in aquatic insects, associated with progressive anthropogenic alteration of river environments, undoubtedly exerts a harmful influence on the conservation of this species. (C) 2009 Elsevier Ltd. All rights reserved.
  • Hiroyuki Yamada, Futoshi Nakamura
    LANDSCAPE AND ECOLOGICAL ENGINEERING 5 (2) 169 - 181 1860-1871 2009/07 [Refereed][Not invited]
    In recent years, fine sediment, produced by run-off associated with forestry activity and agricultural development that accumulates on riverbeds, has exerted a deleterious influence on lotic ecosystems. This study examined the Oroennukibetsu River, a tributary of the Nukibetsu River, which has been affected by high loads of suspended sediments. Effects of accumulation of fine sediment on the survival rate of masu salmon embryo and also on the redd environment (permeability and intragravel dissolved oxygen concentration) were quantified through a field experiment. Results show that the interchange of DO between intragravel and surface water was not affected directly by permeability or the accumulated fine sediment and that intragravel flow rates can be an important factor controlling embryo survival. A decrease in permeability associated with accumulation of fine sediment lowered the survival rate of embryos by suffocation because the flux of DO that should be supplied to the embryo was severely limited. This situation might be created by the combined effects of an accumulation of fine sediment on the redd and a low DO concentration in the surface water because the DO concentration almost coincided with the intragravel DO.
  • 石山 信雄, 渡辺 恵三, 永山 滋也, 中村 太士, 劒持 浩高, 高橋 浩揮, 丸岡 昇, 岩瀬 晴夫
    Ecology and civil engineering 応用生態工学会 12 (1) 57 - 66 1344-3755 2009/07 [Refereed][Not invited]
  • Jung Il Seo, Futoshi Nakamura
    EARTH SURFACE PROCESSES AND LANDFORMS 34 (6) 786 - 800 0197-9337 2009/05 [Refereed][Not invited]
    The annual fluvial export of large wood (LW) was monitored by local reservoir management offices in Japan. LW export per unit watershed area was relatively high in small watersheds, peaked in intermediate watersheds, and decreased in large watersheds. To explain these variations, we surveyed the amount of LW with respect to channel morphology in 78 segments (26 segments in each size class) in the Nukabira River, northern Japan. We examined the differences in LW dynamics, including its recruitment, transport, storage, and fragmentation and decay along the spectrum of watershed sizes. We found that a large proportion of LW produced by forest dynamics and hillslope processes was retained because of the narrower valley floors and lower stream power in small watersheds. The retained LW pieces may eventually be exported during debris flows. In intermediate watersheds, the volume of LW derived from hillslopes decreased substantially with reductions in the proportion of channel length bordered by hillslope margins, which potentially deliver large quantities of LW. Because these channels have lower wood piece length to channel width ratios and higher stream power, LW pieces can be transported downstream. During transport, LW pieces are further fragmented and can be more easily transported. Therefore, the fluvial export of LW is maximized in intermediate watersheds. Rivers in large watersheds, where the recruitment of LW is limited by the decreasing hillslope margins, cannot transport LW pieces because of their low stream power, and thus LW pieces accumulate at various storage sites. Although these stored LW pieces can be refloated and transported by subsequent flood events, they may also become trapped by obstacles such as logjams and standing trees on floodplains and in secondary channels, remaining there for decades and eventually decaying into fine organic particles. Thus, the fluvial export of LW pieces is low in large watersheds. Copyright (C) 2009 John Wiley & Sons, Ltd.
  • 樹木を用いた魚類生息場改善−標津川の事例から−
    永山滋也, 河口洋一, 中野大助, 中村太士
    寒地土木研究所 (673) 31 - 35 2009 [Not refereed][Not invited]
  • 森本淳子, 竹位尚子, 佐藤弘和, 金子正美, 中村 太士
    景観生態学会誌 13 (1) 2,113-121  2009 [Refereed][Not invited]
  • Shigeya Nagayama, Yoichi Kawaguchi, Daisuke Nakano, Futoshi Nakamura
    CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES 66 (1) 42 - 51 0706-652X 2009/01 [Refereed][Not invited]
    Different size classes of masu salmon (Oncorhynchus masou) were partitioned in three-dimensional space in habitats created by artificially installed large wood (LW) structures in a large river. Fish >300 mm in size (L-sized) returning from the ocean distinctly occurred in sheltered areas near the riverbed, which had a moderate current velocity and contained large root wads or tree trunks; 140-200 mm (M-sized) and 100-120 mm (S-sized) fish selected deep areas of high velocity current adjacent to LW structures; <= 80 mm fish (SS-sized) were most common in the lower depth layers throughout all LW habitats, including shallow areas with moderate currents where LW structures blocked the fast currents. Some SS-sized fish used cover areas provided by branches and leaves. Masu salmon abundance in all size classes combined was greater in habitats with LW structures than in habitats without them. Our study suggests that the natural recruitment of whole trees from the riparian zone or artificial placement of whole trees will have a profound effect on creating salmonid habitats in large rivers.
  • MURAKAMI Marie, KUROSAKI Yasusuke, NAKAMURA Futoshi, GODO Hitomi, TATE Shinichiro, NISHI Koji, HIMURA Masao
    Ecology and civil engineering 応用生態工学会 11 (2) 133 - 152 1344-3755 2008/12 [Refereed][Not invited]
  • Young Sang Ahn, Futoshi Nakamura, Shigeru Mizugaki
    ENVIRONMENTAL MONITORING AND ASSESSMENT 145 (1-3) 267 - 281 0167-6369 2008/10 [Refereed][Not invited]
    Suspended sediment and nutrient loadings from agricultural watersheds have lead to habitat degradation in Lake Takkobu. To examine their relationships with land-use activities, we monitored sediment, nutrient and water discharges into the lake for a 1-year sampling period. The Takkobu River contributed the largest portion of the annual water discharge into the lake, compared with the other tributaries. During dry conditions, lake water flowed into the Kushiro River, and conversely during flooding, Kushiro River water flowed into the lake. Inflows from the Kushiro River had a high proportion of inorganic matter, with high concentrations of total nitrogen and total phosphorus, attributed to agricultural land-use development and stream channelization practiced since the 1960s in the Kushiro Mire. Nutrient loadings from these two rivers were significantly higher during flooding than in dry conditions. However, there was no clear correlation between river discharge and nutrient concentrations. Since land-use activities in the Kushiro River and Takkobu River watersheds were concentrated near rivers, nutrients easily entered the drainage system under low flow conditions. In contrast, water discharged from small, forest-dominated watersheds contained a low proportion of inorganic matter, and low nutrient concentrations. The suspended sediment delivered to the lake during the sample period was estimated as approximately 607 tons, while the total nitrogen and total phosphorus inflows were about 10,466 and 1,433 kg, respectively. Suspended sediment input into the lake was 65%, and total nitrogen and total phosphorus were 40% and 48%, respectively, being delivered by the Kushiro River.
  • TACHIKI Yasuyuki, YOSHIMURA Tetsuhiko, HASEGAWA Hisashi, SAKAI Tetsuro, NAKAMURA Futoshi
    Journal of the Japan Forest Engineering Society 森林利用学会 23 (2) 41 - 52 1342-3134 2008/08 [Refereed][Not invited]
    In 1999, the Forestry Agency of Japan launched a new nation-wide forest resources monitoring project. We developed "DeltaForest: a navigation system for the forest resources monitoring project" using a Personal Digital Assistant (PDA) and the Global Positioning System (GPS). The DeltaForest consists of two components: DeltaTracer and DeltaMapper. The DeltaTracer works on a PDA with a GPS receiver, and navigates the user to the destination point, tracing the route recommended by the predecessor, while the DeltaMapper works on a desktop computer and facilitates the work of editing and storing...
  • Yuri Kumagai, Young Sang Ahn, Futoshi Nakamura
    JOURNAL OF FOREST RESEARCH 13 (4) 223 - 232 1341-6979 2008/08 [Refereed][Not invited]
    The vegetation of Takkobu, northern Japan, has been significantly altered by land-use development following Japanese settlement at the end of the 19th century. In order to assess the impact of human activity on vegetation dynamics in Takkobu, changes in the vegetation composition over the last 300 years were reconstructed from fossil pollen in the sediments of Lake Takkobu. The pollen assemblage represented broadleaved forests on the surrounding hills and alder forests found on the margin of the wetland bordering the lake. Prior to Japanese settlement, the hillside forests consisted predominantly of oak. However, with the onset of land-use development, a significant decline in oak relative to increasing birch was apparent, particularly after the early 1960s. These results suggest that successive logging since the 1880s had gradually undermined the resilience of oak. An increase of Artemisia and birch pollen also indicates an expansion of disturbed land. Since the 1960s, a large part of the broadleaved forests in Takkobu has been converted to larch plantations, although this was not represented in the pollen data because of the underrepresentation of larch pollen. The results of the pollen analysis have implications for forest restoration in Takkobu. The use of long-term data allows the determination of the baseline (natural) vegetation to be restored, and also illustrates the factors affecting present-day vegetation and how it may change in the future.
  • Daisuke Nakano, Futoshi Nakamura
    AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS 18 (5) 780 - 798 1052-7613 2008/07 [Refereed][Not invited]
    1. Many rivers and streams across the world have been channelized for various purposes. Channel cross-sections of meandering rivers are asymmetrical and have cross-sectional diversity in their physical environment; cross-sections of a channelized river are typically trapezoidal and have little cross-sectional diversity, both in physical and ecological conditions. Several programmes to restore stream meanders have been undertaken to improve river ecosystems degraded by channelization. However, the association between diversification in the physical environment due to meander restoration and the macroinvertebrate community structure is poorly known. 2. This study of a lowland river in Japan assessed how the cross-sectional diversity of the physical environment changed with restoration of a meander in a channelized river, and how the macroinvertebrate communities responded to the changes in physical habitat variation. Comparisons were made between the macroinvertebrate communities of a channelized reach, the restored meandering reach, and a natural meandering reach. 3. Natural meandering and restored meandering reaches showed higher cross-sectional diversity in physical variables and total taxon richness across a reach than did the channelized reach. Almost all taxa observed in the natural and restored meandering reaches were concentrated in the shallowest marginal habitats near the banks. Shear velocity increasing with water depth had a negative association with macroinvertebrate density and richness. 4. This study demonstrated that the shallow river bed along the inside of bends formed point bars that provided a highly stable substrate, a suitable habitat for macroinvertebrates in a lowland river. It is concluded that meander restoration could be an effective strategy for in-stream habitat restoration in lowland meandering rivers. Copyright (c) 2007 John Wiley & Sons, Ltd.
  • Daisuke Nakano, Shigeya Nagayama, Yoichi Kawaguchi, Futoshi Nakamura
    LANDSCAPE AND ECOLOGICAL ENGINEERING 4 (1) 63 - 68 1860-1871 2008/05 [Refereed][Not invited]
    Because of human impacts, lowland rivers are among the most degraded running water ecosystems, with their floodplains being the center of human activity. Recently, many programs to restore running water ecosystems have been undertaken using various methods in streams and rivers of North America, Europe, and Far East Asia. However, research and knowledge on the effects of river restoration in lowland rivers are limited around the world. The restoration project involving the first reconstruction of a meandering channel in Asia has been conducted in a lowland river section of the Shibetsu River, northern Japan. We review the geomorphologic and hydraulic characteristics of lowland rivers and their environments for macroinvertebrates and discuss approaches to restoring macroinvertebrate communities in lowland rivers, using insights from the restoration project in the Shibetsu River. It is concluded that the recovery of macroinvertebrate assemblages in channelized lowland rivers requires the implementation of restoration methods to create stable substrates.
  • Jung Il Seo, Futoshi Nakamura, Daisuke Nakano, Hidetaka Ichiyanagi, Kun Woo Chun
    WATER RESOURCES RESEARCH 44 (4) W04428  0043-1397 2008/04 [Refereed][Not invited]
    The fluvial export of large woody debris (LWD) was monitored in 131 reservoirs throughout Japan. Published data on the fluvial export of dissolved and particulate organic carbon were used to estimate the contributions of LWD in carbon budgets. Of all variables tested, watershed area was most important in explaining LWD carbon (LWDC) export, followed by annual precipitation. LWDC export per unit area was relatively high in small watersheds, highest in intermediate-sized watersheds, and decreased in large watersheds. In small watersheds, a large proportion of LWD retained on narrow valley floors may fragment or decay and eventually be exported in forms other than LWD. In intermediate-sized watersheds, LWD supplied from upstream and recruited by bank erosion is consistently transported downstream. In large watersheds, LWD recruitment is limited and LWD transported from upstream is stored on large floodplains. These differences in LWD recruitment, retention and transport in watersheds of different sizes lead to the proportion of LWDC in organic carbon exports to be maximum in intermediate-sized watersheds and decline rapidly in large watersheds.
  • 北海道の川の変貌と再生
    河川レビュー (143) 4 - 11 2008 [Not refereed][Not invited]
  • 本来の渓流環境が持つ生態系を支えるしくみ
    自然保護 (502) 7 - 9 2008 [Not refereed][Not invited]
  • 永山滋也, 河口洋一, 中野大助, 中村太士
    水利科学 (299) 60 - 77 2008 [Refereed][Not invited]
  • Nagayama S, Kawaguchi Y, Nakano D, Nakamura F
    Landscape and Ecological Engineering (4) 69 - 74 2008 [Refereed][Not invited]
    Ecology and civil engineering 応用生態工学会 10 (1) 63 - 71 1344-3755 2007/12 [Refereed][Not invited]
  • 赤坂 卓美, 柳川 久, 中村 太士
    Japanese journal of conservation ecology 日本生態学会 12 (2) 87 - 93 1342-4327 2007/11 [Refereed][Not invited]
  • Shigeya Nagayama, Futoshi Nakamura
    RIVER RESEARCH AND APPLICATIONS 23 (6) 671 - 682 1535-1459 2007/07 [Refereed][Not invited]
    We examined the relationship between the physical environment and habitat use of juvenile masu salmon, Oncorhynchus masou, in the Nobori River in Hokkaido, Japan to provide a perspective for the conservation of fish habitat in regulated streams. The study was undertaken during the autumn and winter, with an emphasis on the hierarchy of three spatial scales: microhabitat, channel-unit and reach scales. The microhabitat-scale analysis indicated juvenile masu salmon preferred a midstream habitat type, with a greater depth (Avg. +/- SD): 35.4 +/- 14.2 cm) and high (43.4 +/- 23.1 cm s(-1)) and uniform current velocities during the autumn, and a channel margin habitat type with a moderate current (about 20 cm s(-1)) and submerged cover during winter. In addition, different cover types have different roles in determining juvenile salmon distributions during winter. Grass cover had extremely high carrying capacities, whereas coarse substrate cover provided winter habitat for larger juvenile salmon. Channel-unit scale analyses showed that abundance of juvenile salmon tended to be higher in pools than runs in the autumn through winter. Reach-scale analysis showed that abundance and mean body length of juvenile salmon significantly differed between differently regulated reaches during winter, associated with the dominant cover type in each reach. This stud y demonstrated that the habitat conditions determining juvenile masu salmon distribution differ according to the season and scale of analysis. Therefore, for conservation of fish communities, it is important to evaluate and conserve or create fish habitats in regulated reaches, with a focus on the hierarchy of spatial scales and seasonal differences. Copyright (C) 2007 John Wiley & Sons, Ltd.
  • 中村 太士
    河川 日本河川協会 63 (6) 38 - 42 0287-9859 2007/06 [Not refereed][Not invited]
  • Daisuke Nakano, Takumi Akasaka, Ayato Kohzu, Futoshi Nakamura
    BIRD STUDY 54 142 - 144 0006-3657 2007/03 [Refereed][Not invited]
  • Daisuke Nakano, Naotoshi Kuhara, Futoshi Nakamura
    JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY 26 (1) 103 - 110 0887-3593 2007/03 [Refereed][Not invited]
    We conducted a field experiment to evaluate the effects of habitat modification by aggregations of the case-building caddisfly Goera japonica Banks (Trichoptera:Goeridae) on the size structure and composition of benthic macroinvertebrate assemblages in a Japanese stream. We compared macroinvertebrate assemblages between cobbles with (intact treatment) and without (removal treatment) case aggregations of G. japonica. The total biomass of macroinvertebrates and Margalef's index did not differ between the treatments, but total abundance and taxon richness were higher in the intact treatment than in the removal treatment. Mean body length of macroinvertebrates was significantly smaller in the intact than in the removal treatment. Abundance of individuals in small (< 1.55 mm body length) and medium (1.55-3.00 mm) size classes was higher in the intact treatment than in the removal treatment, but abundance of individuals in the large (> 3.00 mm) size class did not differ between treatments. For 5 of the 9 dominant macroinvertebrate species, case aggregations facilitated colonization of individuals in small and medium size classes, but not of individuals in the large size class. Assemblage composition changed with habitat modification by the case aggregations. The interstitial spaces created by case aggregations of G. japonica would be at a spatial scale suitable for smaller individuals. Our results suggest that case aggregations of G. Japonica cases facilitate colonization by smaller individuals of certain species. This size-dependent and species-dependent facilitation indicates that the aggregation of case-building caddisflies can change the size structure and composition of benthic macroinvertebrate assemblages.
  • Futoshi Nakamura, Nozomi Shin, Satomi Inahara
    FOREST ECOLOGY AND MANAGEMENT 241 (1-3) 28 - 38 0378-1127 2007/03 [Refereed][Not invited]
    We examined the relationships between floodplain forest structure and disturbance frequencies in bar-braided and incised-meandering channel sections of the Rekifune River, northern Japan. This was undertaken with special reference to the life history traits at seedling and reproductively mature stages of eight dominant species (Chosenia arbutifolia, Populus maximowiezii, Toisusu urbaniana, Salix sachalinensis, Salix pet-susu, Alnus hirsura, Ulmus japonica, and Fraxinus mandshurica var. japonica). These species were generally arranged along the flood frequency and intensity gradient represented by five geomorphic surface types: gravel bar, lower and upper floodplain, secondary channel, and terrace. However, habitat separation between seedlings and conspecific mature stands occurred with geomorphic surface type in four of the eight species, suggesting that these species require more than one geomorphic surface type to complete their life cycles. Comparisons of stand-replacement disturbances between the bar-braided and incised-meandering rivers suggested that the shifting mosaic pattern in association with the evolution of land surfaces plays a vital role in maintaining variety in regeneration habitats and development of riparian forests in a half-century time scale. We conclude that the key factors maintaining the diversity of floodplain tree species in the studied northern temperate forests are: (1) the development of diverse geomorphic surfaces providing regeneration and habitat niches, and (2) the timing of maturation and lifespan of early and mid-successional species consistent with the disturbance frequency. (c) 2007 Elsevier BX All rights reserved.
  • 国土環境保全における治山の役割−過去、現在、そして未来−
    北海道民有林治山事業60周年記念講演会 (社)北海道治山林道協会 25  2007 [Not refereed][Not invited]
  • 森と川と海のつながり−過去、現在、そして未来.
    森林技術 (779) 2 - 5 2007 [Refereed][Not invited]
  • 釧路湿原達古武沼の自然再生に向けて.
    陸水学雑誌 (68) 61 - 63 2007 [Refereed][Not invited]
  • Futoshi Nakamura
    Ecology and Civil Engineering 応用生態工学会 10 (1) 47 - 58 1882-5974 2007 [Refereed][Not invited]
    The majority of published papers in ECE were relating to aquatic ecosystems and written by university and/or institute members. Other fields such as terrestrial or coastal ecosystems should be more focused, and consultant and government employee should be encouraged to submit their case studies. As a philosophy and a target of ECE, interdependence between ecology and civil engineering, holistic view of environment, target for restoration, and ecological health were discussed. At investigation and planning stage, life history trait, habitat condition, disturbance, material cycle, interactions between organisms were examined. The focus should be given to the key habitat corresponding to the key life-stage such as reproduction stage. IBI, RHS and habitat evaluation by GIS were introduced and other multivariate statistical analyses were employed. I believe that evaluation of ecosystem health in a broad scale is an important theme to build effective conservation or restoration plan. At the implementation stage, I doubt the necessity to draw the detail design of engineering structures, rather I feel it produce great mischief. Design with nature or passive restoration should be the first priority. The studies on this stage were very few, probably because evaluation of engineering works was not planned before implementation, and evaluation has not been fulfilled. Thus, at monitoring and evaluation stage, Before-After-(Reference) -Control-Impact design were recommended, and critical lines to refine or improve management plan and engineering works should be presented before implementation. © 2007, Ecology and Civil Engineering Society. All rights reserved.
  • 北海道標津川の本流と河跡湖におけるトビケラ相
    中野 大助, 久原 直利, 赤坂 卓美, 中村 太士
    陸水生物学報(Biology of Inland Waters) 22 37 - 45 2007 [Refereed][Not invited]
  • WATANABE Keizo, NAKAMURA Futoshi, KOBAYASHI Miki, YANAI Seiji, YONEDA Takao, WATANABE Yasuharu, MARUOKA Noboru, KITAYA Hiroyuki
    Ecology and Civil Engineering 応用生態工学会 9 (2) 151 - 165 1344-3755 2006/12/20 [Refereed][Not invited]
    The purpose of this research is to explain the relationship between the winter habitat for juvenile masu salmon and three hierarchical structures: channel unit, subunit and microhabitat. The research was conducted at the Makomanai River and Shakotan River, southwest part of Hokkaido, from the middle to the end of December 2001. The natural stream reaches of both rivers are assigned as segment one. The three hierarchical stream structures are designated at the lower hierarchy under stream reaches. The channel unit is at the uppermost part, follows by subunit and then microhabitat. The results show that winter season environment of the juvenile masu salmon depends on two hierarchical stream structures, subunit and microhabitat. The winter season environment is related to combination of subunits close to the riverbank of the pool and glide that have relatively slow current velocity and small Froude number (Fr < 0.125), and the microhabitats with cover that have even slower current velocity. Not only is the microhabitat significant to winter season environment for juvenile masu salmon, but also the subunits around the microhabitat that have slow current velocity and small Froude number. We considered the subunits and microhabitats are very important habitat for the juvenile masu salmon before winter season in addition to the period during winter season. It is, therefore, suitable to regard the hierarchical characteristic of stream structure as contiguous habitat that shows seasonal change. Furthermore, we proposed river management methods with consideration of the winter season environment based on this research results as follows. We should be aware of conserving and creating channel unit with subunit and microhabitat for winter season by river management in the scale of the stream reach. In terms of microhabitat, we should pay attention to microtopography, vegetation and coarse woody debris.
  • Shigeru Mizugaki, Futoshi Nakamura, Tohru Araya
    CATENA 68 (1) 25 - 40 0341-8162 2006/12 [Refereed][Not invited]
    The purpose of this study is to describe the history of sediment deposition that has been occurring for several decades along the margins of the Kushiro Mire, into which the Kuchoro River drains. The dendrogeomorphic technique was used to examine an even-aged forest and adventitious roots to assess short-term (20 years) deposition rates and the frequency of heavy rainfall events. For medium- (40 years) and long-term (100 years) deposition rates, radiochronotogical analyses using Cs-137 and Pb-210 were also conducted. Several instances of high deposition rates caused by flooding events during the last 20 years were identified from the analysis of adventitious roots. The average sedimentation rate from 1963 to the present, estimated from the Cs-137 study, is over 1.3 cm/year. Using the Pb-210 dating method, based on a CFCS model which considered the organic matter content appropriate to wetland sediment, three deposition rates in the last 60 years were estimated: 2.0 cm/year from 1981 to 2000, 8.9 cm/year from 1975 to 1981, and 0.14 cm/year from 1939 to 1975. The analysis of environmental radionuclides indicated that the greatest sedimentation rates occurred in the years 1975 to 1981, when the Kuchoro River was extensively channelized and flood and/or precipitation events occurred. This suggests that land-use development and channelization introduced a large amount of sediment into the marginal areas of wetland through the drainage system and this was deposited on top of the peat soil. (c) 2006 Elsevier B.V All rights reserved.
  • Young Sang Ahn, Shigeru Mizugaki, Futoshi Nakamura, Yugo Nakamura
    GEOMORPHOLOGY 78 (3-4) 321 - 334 0169-555X 2006/08 [Refereed][Not invited]
    Environmental degradation, including shallowing, deterioration of aquatic habitat and water pollution, has arisen from the inflow of fine sediment to Lake Takkobu in northern Japan. The lake has experienced gradual environmental degradation due to agricultural development, which has introduced both fine sediment and sediment-associated nutrients into the lake. We have reconstructed the history of sediment yield to Lake Takkobu in Kushiro Mire over the last 300 years and have examined trends with reference to land-use development. Fifteen lake sediment core samples were obtained, and various physical variables of lake sediments were analyzed and dated using Cs-137 and tephrochronology. The physical variables showed that all points contained mainly silt, except for two points close to the river mouths, where the mean diameter was < 35 mu m. The peaks were defined as a "signal" when the physical variables were synchronous in a profile. These were created by floods and engineering works constructing drainage systems. The signal of canal construction in 1898 was detected in all core points. Lake Takkobu core samples contained two tephra layers. From the refractive indices of dehydrated glasses, the lower tephra layer was identified as Ko-c2 (1694) and the upper tephra layer as Ta-a (173 9). A clear peak in the Cs-137 concentration was detected at all the sampling points, except for the site close to the Takkobu River. This site showed two peaks in the Cs-137 concentration, which was attributed to perturbation from flood events and a drainage project. The maximum Cs-137 concentration was identified as the sediment surface from 1963, enveloped by the 1962 and 1964 signals. The sediment yield averaged over the last 300 years for Lake Takkobu was reconstructed for four periods using the signal, tephra and Cs-137 as marker layers. The sediment yield under the natural erosion condition for the first two periods was 226tons/year from 1694 to 1739 and 196tons/year from 1739 to 1898. The development of the Takkobu watershed started in 1880s with partial deforestation and channelization in 1898, 1959, and 1962 leading to an increased sedimentation yield of 1016tons/year from 1898 to 1963. Continued deforestation, channelization works in 1964, road construction in 1980-1990s, as well as agriculture development caused a further increase to 1354tons/year from 1963 to 2004. Compared to the averaged natural sedimentation yield of 206tons/year until 1898, initial land-use development in a catchment accelerated lake sedimentation, indicated by the 5-fold sediment yield. With increasing agricultural development since 1960s, sedimentation yields were highest for 1963-2004; a 7-fold increase compared with pre-impact conditions. To reduce sediment yield, riparian buffers along the rivers should be preserved or rebuilt, and sluices may function effectively during short-term periods of flooding. Environmental management policy and laws restricting uncontrolled and inappropriate land-use might help in addition to ensure longer-term environmental health by reducing the sedimentation rate. (c) 2006 Elsevier B.V. All rights reserved.
  • Daisuke Nakano, Futoshi Nakamura
    RIVER RESEARCH AND APPLICATIONS 22 (6) 681 - 689 1535-1459 2006/07 [Refereed][Not invited]
    The effects of restoration of channel meandering and of groyne structures on physical variables and river-dwelling macroinvertebrates were examined in a lowland river, the Shibetsu River in Northern Japan. The lowland segment of the Shibetsu River, which previously meandered, was straightened by channelization and groynes installed on some portions of the channelized reach. In 2002, the channelization works were partly reversed to improve the degraded river ecosystem. Physical environment variables and macroinvertebrate community structure and composition were compared among reconstructed meanders and channelized reaches with and without groynes. The shear stress of the river edge in reconstructed meanders and groyne reaches was lower than that in a channelized reach. In addition, the edge habitat near the stream bank created by the reconstructed meander and groyne reaches had higher total density and taxon richness of macroinvertebrates than those of the channelized reach. Restoration provided a relatively stable edge habitat, contributing to the recovery of macroinvertebrate communities in such channelized lowland rivers. The placement of groynes can be an effective method of in-stream habitat restoration for macroinvertebrates. Copyright (c) 2006 John Wiley & Sons, Ltd.
  • “流砂系”から考える国土の保全
    フロント(水の文化情報誌) (1) 16 - 18 2006 [Not refereed][Not invited]
  • 地形変化に伴う生物生息場形成と生活史戦略:人為的影響とシステムの再生をめざして.
    中村太士, 中野大助, 河口洋一, 稲原知美
    地形 27 (1) 41 - 64 2006 [Refereed][Not invited]
  • Lateral variation of a lotic macroinvertebrate community from the headwater to lowland meandering stream in the Nishibetsu River basin, northern Japan
    Nakano, D, Nakamura, F
    Verhandlungen der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie 29 1377 - 1382 2006 [Refereed][Not invited]
  • Y Tachiki, T Yoshimura, H Hasegawa, T Mita, T Sakai, F Nakamura
    JOURNAL OF FOREST RESEARCH 10 (6) 419 - 427 1341-6979 2005/12 [Refereed][Not invited]
    The objectives of this study were to determine Global Positioning System (GPS) positional errors while moving under the forest canopy and to clarify the effects of polyline simplification on area and perimeter estimations. We used the Pathfinder Pro XR and GPSMAP 76S, which are categorized as '' high-end mapping '' and '' general navigation '' GPS receivers, respectively. The field tests were conducted in both natural and plantation forests. The results showed that the Pathfinder Pro XR, which has better multipath rejection technology, worked well, especially in the plantation forest under unfavorable conditions of higher stand density. We used analysis of variance to clarify the effects of the receiver type, positioning mode, stand type, and polyline simplification method on area and perimeter estimations. The receiver type and positioning mode were found to be significant factors that affected area estimation. The Pathfinder Pro XR estimated the area more accurately than the GPSMAP 76S, and differential GPS estimated the area more accurately than autonomous GPS. With respect to the perimeter, the receiver type, positioning mode, and polyline simplification method were found to be significant factors. The results showed that perimeter estimation was improved by using the velocity filter, and further improved by using the velocity filter and Douglas-Peucker algorithm, especially when the Pathfinder Pro XR was used. The GPSMAP 76S estimated the perimeter accurately without any filtering because its default speed filter worked well, even though the GPSMAP 76S is a general navigation GPS receiver.
  • H Yamada, F Nakamura, Y Watanabe, M Murakami, T Nogami
    HYDROLOGICAL PROCESSES 19 (13) 2507 - 2524 0885-6087 2005/08 [Refereed][Not invited]
    Permeability of a streambed is an important factor regulating nutrient and oxygen availability for aquatic biota. In order to investigate the relationship, an accurate permeability should be measured. However, it is difficult to measure permeability in a coarse gravel bed using a conventional permeability test. Moreover, turbulent flow may occur in coarse bed material, and then deviations from Darcy's law do occur. Thus, permeability calculated following Darcy's law may be overestimated under turbulent flow conditions and should be corrected. The packer test can be used in highly permeable gravel beds. We developed a field method applicable to a gravel bed using the packer test and derived an equation adopting a law of turbulent flow to study the problems under any type of flow condition. The accuracy of the equation was examined using a laboratory flume with a gravel bed. The results suggested that permeability calculated from Hvorslev's equation is overestimated for turbulent flow. In contrast, our equation, developed here, could evaluate permeability accurately under any type of flow condition. Copyright (c) 2005 John Wiley & Sons, Ltd.
  • N Shin, F Nakamura
    PLANT ECOLOGY 178 (1) 15 - 28 1385-0237 2005/05 [Refereed][Not invited]
    Classification of riverbed geomorphic surfaces based on flooding frequency was conducted and the relationship between their distribution and river morphology was analyzed, to provide an understanding of the structure and species composition of riparian forests dominated by Chosenia arbutifolia. The channel floors of two contrasting river morphologies (bar-braided and incised meandering channels), were divided into five geomorphic surfaces (gravel bar, lower and upper floodplains, secondary channel, and terrace) based on the water level of a 2-yr and a 20-yr recurrence interval. The environmental variables of the same geomorphic surfaces showed similar trends regardless of braided and meandering channel morphology, but differed significantly among the five geomorphic surfaces, which influenced the dominance of tree species. The geomorphic surface map based on recurrence interval of flood and physiognomical vegetation map based on aerial photos appeared almost identical. Geomorphic surface distribution, determined by river channel dynamics and the sediment transport processes occurring at a larger scale and a longer time frame, played an important role in shaping the structure and composition of the riparian forests. C. arbutifolia dominated gravel bar, and the upper and lower floodplains, because these geomorphic surfaces were characterized by gravelly soils which have lower soil moisture availability than soils of other geomorphic surfaces. Thus, an extensive distribution of C. arbutifolia in the braided channel section can be attributed to the frequent lateral migrations of river channels, which resulted in a high ratio of gravel bars, and lower and upper floodplains. In order to preserve indigenous plant communities in riparian zone, dynamic nature and processes of braided rivers should be maintained.
  • 標津川における河川生態学術研究の取り組み
    RIVER FRONT (52) 22 - 25 2005 [Not refereed][Not invited]
  • 高津文人, 河口洋一, 布川雅典, 中村太士
    応用生態工学 7 (2) 201 - 213 2005 [Refereed][Not invited]
  • 松田裕之, 矢原徹一, 波田善夫, 長谷川眞理子, 日鷹一雅, ホーテスシュテファン, 角野康郎, 鎌田麿人, 神田房行, 加藤真, 國井秀伸, 向井宏, 村上興正, 中越信和, 中村太士, 中根周歩, 西廣(安島, 美穂, 西廣淳, 佐藤利幸, 嶋田正和, 塩坂比奈子, 高村典子, 田村典子, 立川賢一, 椿宜高, 津田智, 鷲谷いづみ
    保全生態学研究 (10) 63 - 75 2005 [Refereed][Not invited]
  • A hierarchical approach to ecosystem assessment of restoration planning at regional, catchment and local scales in Japan.
    Nakamura, F, Inahara, S, Kaneko, M
    Landscape and Ecological Engineering (1) 43 - 52 2005 [Refereed][Not invited]
  • 河口洋一, 中村太士
    日本生態学会誌 (55) 497 - 505 2005 [Refereed][Not invited]
  • 河口洋一, 中村太士, 萱場祐一
    応用生態工学 7 (2) 187 - 199 2005 [Refereed][Not invited]
  • Nakamura, F, Yamada, H
    Japan Ecological Engineering 24 539 - 550 2005 [Refereed][Not invited]
  • Tachiki, Y, Yoshimura, T, Hasegawa, H, Mita, T, Sakai, T, Nakamura, F
    The Japan Forest Engineering Society 20 (1) 23 - 28 2005 [Refereed][Not invited]
  • NAKANO Daisuke, NUNOKAWA Masanori, NAKAMURA Futoshi
    Ecology and Civil Engineering 応用生態工学会 7 (2) 173 - 186 1344-3755 2005 [Refereed][Not invited]
    In March 2003, a re-meandering experiment, connecting main channel with an oxbow lake, was implemented in Shibetsu River, located in eastern Hokkaido, northern Japan. The objective of this study is to examine the changes in distribution and structure of macroinvertebrate community before and after the re-meandering experiment in the alluvial lowland river. We investigated composition of macroinvertebrate community in straight reach, oxbow lake (pre-experiment), and re-meandering reach (post-experiment). After the oxbow lake was connected with the main channel, we set five transect lines for quantitative evaluation of macroinvertebrate at three study reaches (natural meandering, re-meandering and straight channel). The hypothesis we tested was that the re-meandering reach containing more diverse habitat environments has more diverse macroinvertebrate community than do straight channel. The study results showed that most lentic species were replaced with lotic species after the connection. Most taxa identified on transects, however, were found at shallow shorelines of point bar, which we did not expect before the experiment. Since taxa richness and abundance were negatively correlated with shear velocity, a low shear stress and resultant bed stability at the shorelines of point bar are responsible for a high abundance and richness of macroinvertebrate community. Those results indicated a role of point bar for keeping abundance and diversity of macroinvertebrate in alluvial lowland river. Taxa richness and abundance of macroinvertebrate community in re-meandering channel had once recovered to the level of natural meandering channel in June, but this recovery was not maintained until November. We believe that this is due to the continuous movement and changes of bed material as well as channel morphology. The re-meandering reach is still dynamic and we have to monitor the physical process as well as ecological response until it reaches to the stable phase.
  • 自然再生の目標像と空中写真利用
    林業技術 (742) 16 - 17 2004 [Not refereed][Not invited]
  • 蛇行河川を取り戻せるか
    フロント(水の文化情報誌) (2) 22 - 23 2004 [Not refereed][Not invited]
  • 川のあるべき姿を取り戻す.
    河川レビュー (125) 4 - 9 2004 [Not refereed][Not invited]
  • 森林と河川の相互作用−物理化学系ならびに生態系の視点から−.
    水工学シリーズ04-A-5.土木学会 A (5) 1 - 11 2004 [Refereed][Not invited]
  • 自然再生−地域(region),流域(catchment),地区(local site)における分析と復元の考え方.
    日本緑化工学会誌 30 (2) 391 - 393 2004 [Refereed][Not invited]
  • 森林機能論の史的考察と施業技術の展望.
    林業技術 (753) 2 - 6 2004 [Refereed][Not invited]
  • Shibata, H, Sugawara, O, Toyoshima, H, Wondzell, S. M, Nakamura, F, Kasahara, T, Swanson, F. J, Sasa, K
    Biogeochemistry 69 83 - 104 2004 [Refereed][Not invited]
  • F Nakamura, S Kameyama, S Mizugaki
    CATENA 55 (2) 213 - 229 0341-8162 2004/01 [Refereed][Not invited]
    The suspended sediment discharge in the Kuchoro River, a tributary of the Kushiro River, showed that wash load was about 90% of the yearly total suspended load carried into the wetland from the entire watershed. Seasonal floods associated with typhoons and snowmelt carried a large volume of wash load, 44% and 37%, respectively, of the yearly total wash load. The deposition of suspended sediment in the channelized section has aggraded the riverbed by 2 m in the past two decades, which has reduced the cross-sectional area of the channel, so that turbid water spills over and carries wash load and suspended sediment deep into the wetlands. Flooding of turbid water, in association with aggradation of the riverbed, was detected by using a Water Turbidity Index. The flooding and turbidity have significantly increased between 1984 and 1994. Similarly, a Normalized Difference Vegetation Index map showed that forest establishment has continued from the wetland margins and in areas adjacent to the river channel. The suspended sediment carried and deposited by floods and sediment-associated nutrients should alter the edaphic environment from wet nutrient-poor soil to dry nutrient-rich soil providing regeneration habitats for tree species. The vegetation in turn adds resistance and friction against flows and contributes to additional sedimentation. However, flooding and the associated high water table causes stress for trees and may lead to premature decay. Environmental variables, such as water level, water content, organic content and grain size, varied significantly along cross-sectional distance, and are likely regulated by deposition of fine sediments transported by floods. Electrical conductivity and total nitrogen in groundwater varied significantly along the longitudinal distance. Basal areas of willow and alder stands correlated with variables related to spread of turbid water, which indicates that eutrophication of groundwater indirectly affects marsh forest expansion. (C) 2003 Elsevier B.V. All rights reserved.
  • 中村隆俊, 山田浩之, 仲川泰則, 笠井由紀, 中村太士, 渡辺綱男
    応用生態工学 7 (1) 53 - 64 1344-3755 2004 [Refereed][Not invited]
  • 山田浩之, 中村隆俊, 仲川泰則, 神谷雄一郎, 中村太士, 渡辺綱男
    応用生態工学 7 (1) 37 - 51 1344-3755 2004 [Refereed][Not invited]
  • 佐川 志朗, 三沢 勝也, 妹尾 優二, 中村 太士
    魚類學雜誌 日本魚類学会 50 (1) 63 - 66 0021-5090 2003/05/23 [Refereed][Not invited]
  • 河川氾濫原および湿原の再生
    緑の読本 (64) 54 - 60 2003 [Not refereed][Not invited]
  • 自然再生の考え方−その原則と適用−
    環境技術 (32) 44 - 51 2003 [Not refereed][Not invited]
  • 河畔緩衝帯の生態学的意義と草地開発が水辺の生態系に及ぼす影響.
    山田浩之, 中村太士
    Grassland Science 48 (6) 548 - 556 2003 [Refereed][Not invited]
  • 高橋和也, 林靖子, 中村太士, 辻珠希, 土屋進, 今泉浩史
    応用生態工学 5 (2) 139 - 167 1344-3755 2003 [Refereed][Not invited]
  • 自然再生事業の方向性.
    土木学会誌 (88) 20 - 24 2003 [Refereed][Not invited]
  • 釧路湿原の現状と自然再生事業の概要.
    中村太士, 中村隆俊, 渡辺修, 山田浩之, 仲川泰則, 金子正美, 吉村暢彦, 渡辺綱男
    保全生態学研究 (8) 129 - 143 2003 [Refereed][Not invited]
  • 高橋和也, 土岐靖子, 中村太士
    日本緑化工学会誌 29 (3) 423 - 437 0916-7439 2003 [Refereed][Not invited]
  • 立木靖之, 吉村哲彦, 長谷川尚史, 酒井徹朗, 尾張敏章, 三田友規, 中村太士
    日本林学会誌 86 5 - 11 2003 [Refereed][Not invited]
  • SAGAWA Shirou, YAMASHITA Shigeaki, SATOU Kimitoshi, NAKAMURA Futoshi
    JAPANESE JOURNAL OF ECOLOGY 一般社団法人 日本生態学会 53 (2) 95 - 105 0021-5007 2003 [Refereed][Not invited]
    Habitat use and diet variation of immature (age 0+ and age ≧1+) Sakhalin taimen (Hucho perryi) during fall were studied in second- and third-order tributaries of A Stream, northern Hokkaido, Japan. Sakhalin taimen aged 0+ were most abundant near the shore of the second- order tributary, whereas those aged ≧1+ were most abundant in the thalweg of the third-order tributary. The size of the fish was positively correlated with water depth and cover patch size. The composition of the stomach content differed markedly between masu salmon (Oncorhynchus masou) and Sakhalin taimen. The former comprised terrestrial insects (IRI% = 66.8), whereas the latter comprised ephemeroptera (IRI% = 62.9). These results indicate that the masu salmon is a typical drift forager, whereas the Sakhalin taimen shows benthos foraging. Fish, particularly the Siberian stone loach (Noemacheilus barbatulus tori) and the Amur stickleback (Pungitius sinensis sinensis), constituted a fairly large part (IRI% = 30.6) of the diet of Sakhalin taimen aged ≧1+. Furthermore, those aged ≧1+ cannibalized individuals of their own species aged 0+. In order to preserve immature Sakhalin taimen, migration routes throughout the river system must be maintained and bank cover with a slow water velocity, undisturbed stream beds for benthic invertebrates and riparian forest for terrestrial insects are required.
  • 高木麻衣, 中村太士
    日本林学会誌 85 214 - 221 2003 [Not refereed][Not invited]
  • H Yamada, F Nakamura
    RIVER RESEARCH AND APPLICATIONS 18 (5) 481 - 493 1535-1459 2002/09 [Refereed][Not invited]
    The Makomanai River in northern Japan has suffered considerable fine sediment deposition, especially in a reach where channel works have been constructed. Four contiguous reaches were examined for deposition of fine sediment and the effects of such on periphyton biomass; two of the reaches had channel works and bank protection, respectively, the other two being unmodified. The influence of fine sedimentation on epilithic periphyton biomass (chlorophyll a weight and organic matter weight) and the autotrophic index (AI), and the relationship between these and hydraulic variables was emphasized. Fine sediment increased, chlorophyll a decreased and AI increased in the reach with channel works and in the unmodified reach immediately upstream. In addition, the current velocity and Froude number tended to decrease in the reach with channel works. Correlation analysis showed that with an increase in fine sediment, chlorophyll a decreased and non-living periphyton, indicated by AI, increased. It was also confirmed that fine sediment increased with an increase in weight of periphyton organic matter and decreased with an increase in current velocity or Froude number. These results suggest that accumulation of fine sediment, which substantially reduces light penetration for photosynthesis under low current velocity conditions, results in lowered periphyton levels. The channel works have lowered the current velocity, thus promoting deposition of fine sediment and an increase in non-living periphyton. Copyright (C) 2002 John Wiley Sons, Ltd.
  • SAGAWA Shirou, NAKAMURA Futoshi, SEO Yuji, KIMURA Akihiko, MISAWA Katsuya, IRIE Kiyoshi, FUJITA Makoto, WATANABE Toshiya
    Ecology and civil engineering 応用生態工学研究会 5 (1) 85 - 102 1344-3755 2002/08/10 [Refereed][Not invited]
  • 実験的管理による湿原の保全・管理−釧路湿原.
    フロント(水の文化情報誌) (1) 60 - 63 2002 [Not refereed][Not invited]
  • 流域と川の変貌,そして再生への目標.科学
    岩波書店 72 (1) 74 - 76 2002 [Not refereed][Not invited]
  • どうしたら自然再生事業は日本に根づくのか.
    JEAS News (96) 12 - 13 2002 [Not refereed][Not invited]
  • ダム堆砂量に関わる要因と生態系保全上の課題.
    中村太士, 竹門康弘
    応用生態工学 5 (1) 2002 [Not refereed][Not invited]
  • 森林の公益的機能と施業計画論.
    林業技術 (721) 2 - 6 2002 [Refereed][Not invited]
  • 森林の公益的機能の限界と可能性.
    土木学会誌 (87) 39 - 42 2002 [Refereed][Not invited]
  • 自然再生事業の現状と課題.
    環境研究 (126) 55 - 63 2002 [Refereed][Not invited]
  • F Nakamura, M Jitsu, S Kameyama, S Mizugaki
    RIVER RESEARCH AND APPLICATIONS 18 (1) 65 - 79 1535-1459 2002/01 [Refereed][Not invited]
    The Kushiro Mire, the largest mire in Japan, presently faces the serious problem of turbid water flooding. Shortening of stream channels associated with agricultural development is a major cause of streambed aggradation. This aggradation reduces the carrying capacity of the channel, resulting in sediment laden water spilling over the wetlands in a flood event. Sedimentation progresses with repeated inundation by turbid water. which significantly alters the edaphic conditions, and thereby the composition and structure of marsh forests. Aggradation of the geomorphic surfaces with sedimentation lowers the water level, and increases soil particle size and nutrient status. This situation was clearly displayed in an ordination of canonical correspondence analysis. Among the environmental variables, water level was related most strongly to the pattern of a forest community. Salix species dominated the flood areas, which were characterized by a low water level, coarse sediment, and high electrical conductivity. Alnus japonica, the most common tree species in the Kushiro Mire, favors soil conditions represented by high water table and organic content. A. japonica adapts to a higher water level by developing lenticels with hypertrophied and adventitious roots. multiple sprouting and regenerates vegetatively. Basal areas (BAs) of A. japonica, however, seem to be limited by high fluctuations in water levels, which are amplified by channelization. This raises serious concerns for the integrity of the Kushiro Mire. It is important to implement a conservation plan from a watershed perspective because most problems originate in upper basins. Creating riparian buffer strips, sediment-filtering wetlands, and restoring the original meandering course may slow down sedimentation in the mire, and thus help to restore the natural hydrological regime. Copyright (C) 2002 John Wiley Sons, Ltd.
  • SAGAWA Shirou, YAMASHITA Shigeaki, NAKAMURA Futoshi
    JAPANESE JOURNAL OF ECOLOGY 一般社団法人 日本生態学会 52 (2) 167 - 176 0021-5007 2002 [Refereed][Not invited]
    The summer habitat of adult Sakhalin taimen (Hucho perryi) was studied in a fourth-order tributary of the Teshio River, Hokkaido. Sakhalin taimen selected large pools with slow water velocity and canopy shade or cover (especially canopy shade). The maximum number of Sakhalin taimen observed in pools during three censuses was positively correlated with the percentage of canopy shade or cover, while the maximum body size was positively correlated with the bed area. The study section had a reach within some nature-oriented river works, but no taimen were found there, probably because of insufficient pool sizes and canopy shade or cover patch for this species. On the other hand, Sakhalin taimen in this study stream are known to spawn from May to June in first-, second- and third-order streams where meandering channels and riparian forests are well preserved. These results suggest the importance of preserving large deep pools with canopy shade or cover and allowing adult taimen to migrate upstream (first-, second- and third-order streams) and downstream (fourth-order streams) throughout the river system.
  • S Kameyama, Y Yamagata, F Nakamura, M Kaneko
    REMOTE SENSING OF ENVIRONMENT 77 (1) 1 - 9 0034-4257 2001/07 [Refereed][Not invited]
    A new water-turbidity index (WTI) based on multispectral images was developed and tested at Kushiro Mire, eastern Hokkaido, Japan. An algorithm for turbidity estimation was developed and applied to Landsat TM images to monitor the turbid water on the mire surface during the snow-melting season. We used spectral mixture analysis (SMA) to produce a turbidity estimation model. The SMA "unmixes" a mixed pixel determining the fractions due to each spectral end member. In this study, we used four end members (1, alder; 3, reed; 3, high-concentration turbid water (485 ppm); 4, low-concentration turbid water(10 ppm) measured in the test site. The WTI was determined by the following equation: WTI = a(max)/(a(max) + a(min)), where a(max) is abundance of high-concentration turbid water and a(min) is abundance of low concentration turbid water. The end-member spectra of alder and reed were measured in the laboratory using specimens collected at the test site. The spectrum of turbid water was measured at the test sites. The relative abundance of each end member was estimated based on this spectral information using SMA. The same formula was applied to Landsat TM images. Then we applied the WTI equation to the end-member images to obtain a WTI map. In the mire wetland region, turbid water spreads under alder trees and reed grasses. Tb verify our turbidity estimation method based on WTI under these conditions, we constructed a small experimental wetland consisting of mixed stands of alder acid reed. WTI was calculated from the mixed spectrum of this "artificial wetland" and the regression curve for the relation between WTI and the actual turbidity was determined (R-2=.91). Finally, this regression equation was used to derive a turbidity map from the WTI image. (C) 2001 Elsevier Science Inc. All rights reserved.
  • パートナーシップによる新しい川づくり.
    フロント(水の文化情報誌) (2) 64 - 67 2001 [Not refereed][Not invited]
  • 伝統的工法が織りなす水辺景観の創造.
    フロント(水の文化情報誌) (5) 60 - 63 2001 [Not refereed][Not invited]
  • 名橋と竹林を残す多自然型川づくりの試み.
    フロント(水の文化情報誌) (8) 60 - 63 2001 [Not refereed][Not invited]
  • 実験的管理の構想と実践.
    河川 (3) 6 - 11 2001 [Not refereed][Not invited]
  • 礫河原の復元とカワラノギクの再生.
    フロント(水の文化情報誌) (11) 60 - 63 2001 [Not refereed][Not invited]
  • 多自然型川づくりの歩みと今後の展望.
    河川 (11) 15 - 19 2001 [Not refereed][Not invited]
  • 北海道における自然復元の取り組み−釧路湿原の保全および標津川再蛇行化計画−
    水情報 21 (11) 13 - 17 2001 [Not refereed][Not invited]
  • 渡辺恵三, 中村太士, 加村邦茂, 山田浩之, 渡邊康玄, 土屋進
    応用生態工学 4 (2) 133 - 146 1344-3755 2001 [Refereed][Not invited]
  • 村上まり恵, 山田浩之, 中村太士
    応用生態工学 4 (2) 109 - 120 1344-3755 2001 [Refereed][Not invited]
  • F Nakamura, FJ Swanson, SM Wondzell
    HYDROLOGICAL PROCESSES 14 (16-17) 2849 - 2860 0885-6087 2000/11 [Refereed][Not invited]
    Geomorphological processes that commonly transport soil down hillslopes and sediment and woody debris through stream systems in steep, mountainous, forest landscapes can operate in sequence down gravitational flowpaths, forming a cascade of disturbance processes that alters stream and riparian ecosystems. The affected stream and riparian landscape can be viewed through time as a network containing a shifting mosaic of disturbance patches - linear zones of disturbance created by the cascading geomorphological processes. Ecological disturbances range in severity from effects of debris flows, which completely remove alluvium, riparian soil and vegetation along steep, narrow, low-order channels, to localized patches of trees toppled by floating logs along the margins of larger channels. Land-use practices can affect the cascade of geomorphological processes that function as disturbance agents by changing the frequency and spatial pattern of events and the quantity and size distribution of material moved. A characterization of the disturbance regime in a stream network has important implications for ecological analysis. The network structure of stream and riparian systems, for example, may lend resilience in response to major disturbances by providing widely distributed refuges. An understanding of disturbance regime is a foundation for designing management systems. Copyright (C) 2000 John Wiley & Sons, Ltd.
  • リュウキュウアユの保全と流域.
    フロント(水の文化情報誌) (5) 64 - 67 2000 [Not refereed][Not invited]
  • 境川,都市に残された緑の回廊を守る.
    フロント(水の文化情報誌) (8) 64 - 67 2000 [Not refereed][Not invited]
  • 物質・生物の移動を確保する砂防への転換.
    フロント(水の文化情報誌) (11) 64 - 67 2000 [Not refereed][Not invited]
  • 中村太士
    ランドスケープ研究 64 (2) 131 - 134 2000 [Refereed][Not invited]
  • Adikari, Y, Kikuchi, S, Nakamura, F
    Transactions Jpn. Geomorphological Union 21 (2) 193 - 207 2000 [Refereed][Not invited]
  • A Nagasaka, F Nakamura
    LANDSCAPE ECOLOGY 14 (6) 543 - 556 0921-2973 1999/12 [Refereed][Not invited]
    Temporal changes in a hydrological system and riparian ecosystem were examined with reference to land-use conversion in order to clarify the linkages between these two systems. First, the hydrological system of the Toikanbetsu River basin was divided into three components that measure water retention, inundation and conveyance. Variation in the hydrological system was expressed as a basis of delineating the three components and estimating their functions. The rainfall-runoff system was also examined using a model which can predict responses of surface-, subsurface- and base flows on rainfall intensity. Second, areas and fragmentation of the riparian forests, maximum stream temperature in summer and amount of coarse woody debris (CWD) were selected as parameters indicating the condition of the riparian ecosystem. Temporal changes in stream temperature and amount of CWD were estimated using multiple regression analysis and analysis of variance, respectively. The results indicated that the hydrological system has been altered since the 1970s, increasing flood peaks by 1.5-2.5 times and shortening peak appearance by 7 hours. Riparian forests have been disappearing since the 1960s due to extensive development of agricultural lands and river channelization. The summer maximum stream temperature increased from 22 degrees C in 1947 to 28 degrees C at present. The amount of CWD should substantially decrease with river channelization and associated forest cutting. Fish favoring cool water, such as masu salmon, could survive in 1947 although they are forced to migrate to cooler forested upstream tributaries now. The ecological systems were closely related to and distinctly altered by land-use. Finally, we propose a new perspective for understanding the two interrelated systems. Riparian ecosystems can be restored by restoring water retention and inundation functions, which also reduce the flood hazard generated by elevated flood peaks.
  • 水辺環境の保全と景観生態学.
    科学(岩波書店) 69 (12) 1029 - 1035 1999 [Refereed][Not invited]
  • 中村太士
    応用生態工学 2 (2) 125 - 139 1344-3755 1999 [Refereed][Not invited]
  • 放射性降下物を用いた釧路湿原河川流入部における土砂堆積厚の推定
    水垣滋, 中村太士
    日本地形学連合学会誌(地形) 20 (2) 97 - 112 1999 [Refereed][Not invited]
  • 岸千春, 中村太士, 井上幹生
    日本生態学会誌 49 11 - 20 1999 [Refereed][Not invited]
  • 阿部俊夫, 中村太士
    応用生態工学 2 (2) 179 - 190 1344-3755 1999 [Refereed][Not invited]
  • 笹岡英二, 矢島崇, 渋谷正人, 高橋邦秀, 中村太士, 清水収
    日本林学会誌 81 22 - 28 1999 [Refereed][Not invited]
  • 中村 太士
    山林 大日本山林会 1375 2 - 9 0487-2150 1998/12 [Not refereed][Not invited]
  • 緑の回廊を考える.
    フロント(水の文化情報誌) (5) 20 - 22 1998 [Not refereed][Not invited]
  • 予測できない生態系の応答を前提とした新たな管理指針−Adaptive Management (適応可能な管理) の必要性−.
    河川 (11) 57 - 63 1998 [Not refereed][Not invited]
  • 流域の視点から河川環境を考える.
    土木学会誌 (83) 37 - 39 1998 [Refereed][Not invited]
  • Forest recovery after disturbance by the 1926 Mudflow at Mount Tokachi, Hokkaido,Japan
    Yajima, T, Nakamura, F, Shimizu, O, Shibuya, M
    Research bulletins of the College Experiment Forests, Hokkaido University 55 (1) 216 - 228 1998 [Refereed][Not invited]
  • 知床国有林の伐採が林分動態に与えた影響 -択伐後10年間の林相と更新-
    大石智子, 菊池俊一, 矢島崇, 清水収, 中村太士
    北海道大学農学部演習林研究報告 55 (2) 349 - 368 1998 [Refereed][Not invited]
  • Application of landscape ecology to watershed management-How can we restore ecological functions in fragmented landscape ? -
    Nakamura, F
    Korean J.Ecol 21 (4) 373 - 382 1998 [Refereed][Not invited]
  • K Yoshida, S Kikuchi, F Nakamura, M Noda
    GEOMORPHOLOGY 20 (1-2) 135 - 145 0169-555X 1997/09 [Refereed][Not invited]
    Abies sachalinensis dominates the alluvial fan head of the Ochiushinai Gully on Rishiri Island, Japan. This species is able to adapt to frequent disturbances by debris flows. Even-aged stands composed of A. sachalinensis or Alnus maximowiczii were found along the channel, and standing dead trees buried by debris flows were discovered at the alluvial fan head. We used dendrochronological data in order to analyse the geomorphic history of the fan head. We determined the master ring-width chronology by synchronizing ring-width variations in living trees. This master chronology was used to cross-date the establishment and death of the buried trees. Results indicated that most of the buried trees were established in the 1870s and died in the early 1950s. Further, debris flow was estimated to have occurred in the 1890s and the late 1960s based upon the distribution of even-aged stands seen in aerial photos. The ring-width variations of the trees adjacent to the channel indicate a low correlation for synchronization, while those located on the hillslope have a high correlation. A low correlation in the riparian trees can be attributed to the instability of geomorphic surfaces caused by debris flow disturbances.
  • M Inoue, S Nakano, F Nakamura
    CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES 54 (6) 1331 - 1341 0706-652X 1997/06 [Refereed][Not invited]
    Relationships between abundance of juvenile masu salmon (Oncorhynchus masou) and stream habitat were analyzed on two spatial scales, stream reach and channel unit, in northern Hokkaido, Japan. Reach-scale analyses revealed that high water temperatures limited the salmon population level and that the salmon abundance increased with cover availability. These two limiting factors were strongly associated with the presence of riparian forest, emphasizing its importance for the salmon population. Channel-unit scale analyses showed greater use of pools by the salmon, with greater depth and abundant cover underlying the patterns of habitat use. However, the relative importance of depth and cover varied among the reach types having different cover availability. In reaches that had abundant cover, cover itself was less important in determining patterns of habitat use within the reaches. In contrast, in reaches with poor cover, patterns of habitat use were strongly affected by cover. The results indicated that habitat characteristics at the reach scale affect not only the salmon abundance of the stream reaches, but also the determinants of local abundance patterns of the salmon within the reaches. It was suggested that larger-scale influences in a hierarchy of habitat scales should be considered for better understanding of fish-habitat relationships.
  • F Nakamura, T Sudo, S Kameyama, M Jitsu
    GEOMORPHOLOGY 18 (3-4) 279 - 289 0169-555X 1997/03 [Refereed][Not invited]
    The effects of wetlands on hydrology, water quality, and wildlife habitat are internationally recognized. Protecting the remaining wetlands is one of the most important environmental issues in many countries. However wetlands in Japan have been gradually shrinking due to agricultural development and urbanization, which generally lowers the groundwater level and introduces suspended sediment and sediment-associated nutrients into wetlands. We examined the influences of channelization on discharge of suspended sediment and wetland vegetation in Hokkaido, northern Japan. The impact of river channelization was confirmed not only by the sediment budgets but also by river aggradation or degradation after the channelization and by the resultant vegetational changes. The budgets of suspended sediment demonstrated that wash load was the predominant component accounting for 95% of the total suspended load delivered into the wetland. This suspended sediment was primarily transported into the wetland by flooding associated with heavy rainfall. Twenty-three percent of the wash load and 63% of the suspended bed material load were deposited in the channelized reach, which produced aggradation of about 2 m at the end of the reach. A shorting of the length of the channel, due to channelization of a meandering river, steepened the slope and enhanced the stream power to transport sediment. This steepening shifted the depositional zones of fine sediment 5 km downstream and aggraded the riverbed. Development of the watershed may increase not only the water discharge but also the amount of suspended sediments. The aggradation reduced the carrying capacity of the channel and caused sediment ladened water to flood over the wetlands. The fine sediment accumulated on the wetlands gradually altered the edaphic conditions and wetland vegetation. A low percentage (10 to 15%) of organic contents of wetlands' soil is more evidence indicating that the present condition is far different from normal. Original vegetation such as sedges and Alnus japonica were disappearing from the adjacent areas of the river channel and were being replaced by willow trees (Salix spp.).
  • 流域的視点からみた釧路湿原保護の現状と課題
    野生生物保護学会会報「ワイルドライフ・フォーラム」 2 (4) 101 - 111 1997 [Not refereed][Not invited]
  • 流域の土地利用と河川環境のつながり−水辺域の構造と機能の回復をめざして−
    世界河川会議論文集 2-34 (2-40) 1997 [Not refereed][Not invited]
  • 森と川と人
    森林科学 (2) 69 - 73 1997 [Not refereed][Not invited]
  • 水辺林−その仕組みと役割−河川におよぼす働き
    グリーンパワー (2) 36 - 37 1997 [Not refereed][Not invited]
  • 水辺林−その仕組みと役割−変わる緑の働き
    グリーンパワー (3) 36 - 37 1997 [Not refereed][Not invited]
  • 水辺林−その仕組みと役割−欧米における保全と管理
    グリーンパワー (5) 36 - 37 1997 [Not refereed][Not invited]
  • 水辺林の保全に向けて−研究の現状と課題−
    林業技術 (8) 2 - 6 1997 [Not refereed][Not invited]
  • Sachiho Sugimoto, Futoshi Nakamura, Akiko Ito
    Journal of Forest Research 2 (2) 103 - 107 1341-6979 1997 [Refereed][Not invited]
    Riparian forests greatly influence aquatic ecosystems by providing shade cover, which controls water temperature and limits primary production. We examined the relationship between forest cover and summer stream temperature in northernmost Japan. Heat budget and statistical analyses were employed and the results were compared. Heat budget analysis revealed that the water temperature would decrease almost linearly from 29°C to 25°C with an increase in forested reaches along a 3.2 km stretch of the river. Multiple regression analysis by the stepwise method chose only open channel length as a variable to explain the variation in maximum stream temperature. A sharp increase in stream temperature was noted when riparian forest cover was removed in short lengths, of up to 1.0 km this increasing trend gradually flattened as the length of open stretch increased. Thus, even small openings in the riparian canopy resulted in drastic rises in summer stream temperature. The maximum summer temperatures estimated by the two methods were coincided, and can therefore be accurately estimated by regression analysis. Retrospective analysis based on the regression equation showed that the maximum summer temperature in 1947 was 6°C lower than at present, and that a sharp increase occurred from 1947 to 1960, a period of rapid expansion of agricultural land development in the watershed.
  • Nakamura, F, Yajima, T, Kikuchi, S
    Plant Ecology 133 (2) 209 - 219 1385-0237 1997 [Refereed][Not invited]
  • F Nakamura, S Kikuchi
    GEOMORPHOLOGY 16 (2) 139 - 145 0169-555X 1996/06 [Refereed][Not invited]
    Floodplain areas are primary storage sites for river sediment. In the Saru River, ages of floodplain surfaces were examined by tree ring analysis, and vertical and horizontal configurations of floodplain deposits were measured by field and aerial-photo surveying. A flood in 1992 provided a good opportunity to examine depositional and erosional processes of floodplain sediment before and after the flood. Predominant disturbances were observed in the unconstrained, wide reaches where floodplains develop. This event indicated that eroded areas of floodplain deposits in each age class linearly increased with sediment volume and that the proportion of the total area eroded decreased exponentially with increase in the age of sediment. We constructed basic equations expressing continuity of age distribution in order to analyze river sedimentation in a time series according to the results of the 1992 flood. The floodplain disturbance rates determined by this analysis showed similar temporal changes with sediment transport rates monitored at the Iwachishi Reservoir. A sharp increase in sediment discharge was seen after 1962 associated with the historical maximum rainfall in the temporal analysis of floodplain sediment. The time series approach presented here is useful for evaluating the speed of sediment waves and the cumulative impact of sedimentation in a river basin.
  • 有賀 誠, 中村太士, 菊池俊一, 矢島 崇
    日本林学会誌 78 (4) 354 - 362 1996 [Refereed][Not invited]
  • 阿部俊夫, 中村太士
    日本林学会誌 78 (1) 36 - 42 1996 [Refereed][Not invited]
    EARTH SURFACE PROCESSES AND LANDFORMS 20 (4) 333 - 346 0197-9337 1995/06 [Refereed][Not invited]
    Recent studies of sediment delivery and budgets in the United States indicate that upland erosion rates at a given time may not explain contemporaneous sediment yields from a drainage basin. This suggests temporal discontinuities in sediment delivery associated with hillslope and channel storage processes. Integration of sediment production, storage and transport is essential to understand sediment routing in basins. We analysed each process chronologically using aerial photographs, monitoring data of sediment movement and annual tree-rings, and then compared estimated temporal changes in sediment production from hillslopes, floodplain disturbance areas and sediment transport in river channels. Toeslopes, floodplains and alluvial fans together contained 59 per cent of sediment eroded from uplands over the last 30 years. Monitoring results of riverbed changes showed that the volume of stored sediment on floodplains decreased exponentially with succeeding floods. The age distribution of floodplain deposits reflected the disturbance history of a river channel, and followed an exponential decrease with age. The results of this study may have important implications for sediment control plans for watersheds in steep regions.
  • Speed of sediment wave in the Saru River estimated by age distribution of sediment.
    Nakamura, F, Kikuchi, S, Araya T
    Proc. International Sabo Sympo., Tokyo, Japan 495 - 502 1995 [Not refereed][Not invited]
  • 渓畔域における森林と河川の相互作用
    「渓畔域の生態的構造と機能−森林と河川の相互作用−」森林科学 (13) 65 - 67 1995 [Not refereed][Not invited]
  • 森林と川のつながりを考える
    現代林業 (11) 24 - 31 1995 [Not refereed][Not invited]
  • 中村太士
    日本生態学会誌 (45) 295 - 300 1995 [Refereed][Not invited]
  • 緑の砂防−流域における土砂動態と河畔域の保全−.
    水工学シリーズ95-A-7.土木学会 A (7) 1 - 20 1995 [Refereed][Not invited]
  • 崎尾 均, 中村太士, 大島康行
    日本生態学会誌 (45) 291 - 294 1995 [Refereed][Not invited]
  • 齋藤正美, 新谷 融, 中村太士
    砂防学会誌(新砂防) 47 (6) 28 - 33 1995 [Refereed][Not invited]
  • 坂本知己, 土屋俊幸, 佐野 真, 中村太士, 梶 光一, 伊藤晶子
    日本林学会誌 77 55 - 65 1995 [Refereed][Not invited]
  • Structure and function of riparian zone and implication for Japanese river management
    Nakamura, F
    Transactions Jpn. Geomorphological Union 16 (3) 237 - 256 1995 [Refereed][Not invited]
    CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE 24 (12) 2395 - 2403 0045-5067 1994/12 [Refereed][Not invited]
    The distribution of coarse woody debris in a fifth-order Cascade Range (Oregon) stream system was examined from a geomorphic point of view. The number, volume, location, orientation, decay class, and pool formation roles of coarse woody debris were investigated. The processes of coarse woody debris production, transport, and storage, which vary with channel and valley floor geomorphology, are responsible for the pattern of coarse woody debris distribution on valley floors. Channel width and sinuosity are the main factors that control production, storage sites, and hydrologic effects of coarse woody debris. The amount of coarse woody debris and the number of pool-forming pieces are relatively high in wide, sinuous reaches, where a complex structure of floodplains and riparian forests develops in association with a braided channel pattern. These relations are transferable to other systems with similar relations of coarse woody debris piece length to channel width.
  • 北海道の山地流域における斜面変動と河床変動の時系列解析.
    新谷融, 中村太士, 清水収, 菊池俊一
    「砂防計画の基本土砂量に関する研究:平成5年度報告」(社)砂防学会, JSECE Pub. (14) 9 - 17 1994 [Not refereed][Not invited]
  • 北海道地域の土砂動態特性と水系砂防計画.
    新谷融, 中村太士, 清水収, 菊池俊一
    第26回(社砂防学会シンポジウム講演集「土砂災害の地域特性と砂防計画−砂防計画の時・空間スケールを考える−」(社)砂防学会, JSECE Pub. (13) 83 - 98 1994 [Not refereed][Not invited]
  • ランドスケープ概念による流域管理計画の策定
    坂本知己, 佐野 真, 土屋俊幸, 梶 光一, 中村太士, 伊藤晶子
    平成6年度研究成果選集,森林総合研究所 22 - 23 1994 [Not refereed][Not invited]
  • 眞板秀二, 丸谷知己, 中村太士
    砂防学会誌(新砂防) 46 (5) 19 - 28 1994 [Refereed][Not invited]
  • 知床国有林の伐採が林分動態に与えた影響 -伐採5年後の林相と更新-
    菊池俊一, 矢島 崇, 中村太士, 清水 収, 沢井 理, 清野 年
    北海道大学農学部演習林研究報告 51 (1) 179 - 205 1994 [Refereed][Not invited]
  • 伊藤晶子, 中村太士
    日本林学会誌 76 160 - 171 1994 [Refereed][Not invited]
  • 伊藤 哲, 中村太士
    森林立地学会誌(森林立地) 36 (2) 31 - 40 1994 [Refereed][Not invited]
    EARTH SURFACE PROCESSES AND LANDFORMS 18 (1) 43 - 61 0197-9337 1993/02 [Refereed][Not invited]
    Effects of coarse woody debris (CWD) on channel morphology and sediment storage were investigated at five sites, representative of first-order to fifth-order streams. In the steep and bedrock-confined stream (first second order), interaction between the channel and CWD was limited, except where breakage upon falling produced CWD pieces shorter than channel width. Channel widening, steepening and sediment storage associated with CWD were observed predominantly in third- to fifth-order streams. Variation in channel width and gradient was regulated by CWD. In the fifth-order stream, most of the CWD pieces derived from the riparian forest interacted directly with the channel without being suspended by sideslopes. In this system CWD promoted lateral channel migration, but sediment storage was temporary, with annual release and capture.
  • 北海道地域における砂防計画の基本土砂量に関する研究
    新谷融, 中村太士, 清水収, 菊池俊一
    「砂防計画の基本土砂量に関する研究:平成4年度報告」 砂防学会誌(新砂防) 1993 [Not refereed][Not invited]
  • ヨーロッパアルプス近自然工法と土地利用計画.
    砂防学会誌(新砂防) 46 (4) 52 - 53 1993 [Not refereed][Not invited]
  • 米国西海岸における森林と河川をめぐる環境諸問題の紹介−景域保全的視点の必要性−.
    水利科学 (209) 41 - 52 1993 [Refereed][Not invited]
  • 流域環境整備における流出抑制施設の役割-札幌市伏篭川の事例-
    井上涼子, 中村太士
    水利科学 212 45 - 65 1993 [Refereed][Not invited]
  • 土地利用政策と林学の役割
    森林科学(日本林学会) (5) 5 - 10 1992 [Not refereed][Not invited]
  • 河道内倒木・流木分布に関する河川地形的考察 −オレゴン州カスケイド山脈山地河川の事例−
    中村太士, フレデリック J, スワンソン
    第103回日本林学会大会発表論文集 577 - 579 1992 [Not refereed][Not invited]
  • 景域保全学をめざして
    治山砂防と自然保護特集(?),北方林業 44 (7) 17 - 22 1992 [Not refereed][Not invited]
  • 流域レベルにおける森林撹乱の波及 −森林動態論における流域的視点の重要性−.
    生物科学 44 (3) 128 - 140 1992 [Refereed][Not invited]
  • 中村太士
    砂防学会誌(新砂防) 45 (3) 29 - 37 1992 [Refereed][Not invited]
  • 中村太士
    砂防学会誌(新砂防) 45 (4) 15 - 21 1992 [Refereed][Not invited]
  • 菊池俊一, 新谷 融, 清水 収, 中村太士
    地すべり学会誌(地すべり) 29 (3) 1 - 9 1992 [Refereed][Not invited]
  • The setting of erosion research and management in Japan and the western U.S. Proc.
    Swanson, F.J, F. Nakamura, G.E. Grant
    Japan-U.S. workshop on Snow Avalanche, Landslide, Debris Flow Prediction and Control, Tsukuba: 517 - 521 1991 [Refereed][Not invited]
  • 樽前火山・覚生唐沢源頭部における斜面侵食の季節変化
    宮縁育夫, 中村太士
    日本地形学連合学会誌(地形) 12 (4) 367 - 377 1991 [Refereed][Not invited]
  • 土砂流出に与える砂防施設の効果
    「砂防施設の土砂流出に与える機能の解明に関する研究」平成元年度報告 1990 [Not refereed][Not invited]
  • 中村太士
    「土砂災害データベースの現状と課題」新砂防(砂防学会誌) 43 (3) 32 - 34 1990 [Not refereed][Not invited]
  • 地表変動と森林の成立についての一考察.
    生物科学 42 (2) 57 - 67 1990 [Refereed][Not invited]
  • 中村太士
    日本林学会誌 72 99 - 108 1990 [Refereed][Not invited]
  • 清水 収, 中村太士, 新谷融
    砂防学会誌(新砂防) 42 (6) 35 - 40 1990 [Refereed][Not invited]
  • 北海道における土砂災害.
    新谷融, 中村太士
    土質工学会誌(土と基礎) 37 (9) 53 - 58 1989 [Refereed][Not invited]
  • Buffer effect of a wide riverbed section on sediment discharge
    Nakamura, F
    Journal of the Faculty of Agriculture, Hokkaido University 64 (1) 56 - 69 1989 [Refereed][Not invited]
  • 野外科学におけるスケール論 -時空間問題の整理-
    北海道大学農学部演習林研究報告 46 (2) 287 - 313 1989 [Refereed][Not invited]
  • 中村太士, 百海琢司
    日本林学会誌 71 387 - 394 1989 [Refereed][Not invited]
  • 自然河川の流路変動と河川環境に関する砂防学的研究
    岡村俊邦, 中村太士
    水利科学 32 (6) 32 - 53 1989 [Refereed][Not invited]
  • デジタイザー入力による森林地形情報の立体表示
    北海道大学農学部演習林研究報告 45 (1) 279 - 299 1988 [Refereed][Not invited]
  • 河川の動態解析に関する砂防学的研究
    北海道大学農学部演習林研究報告 45 (2) 301 - 369 1988 [Refereed][Not invited]
  • Influence of river channel morphology and sediment production on residence time and transport-distance
    Nakamura,F, Araya,T, Higashi,S
    Publication of International Association of Hydrological Sciences 165 355 - 364 1987 [Refereed][Not invited]
  • 河床堆積地の年代分布と滞留時間
    第97回日本林学会大会発表論文集 605 - 606 1986 [Not refereed][Not invited]
    Research bulletin of the Hokkaido University Forests 北海道大学演習林 43 (1) p1 - 26,図2p 0367-6129 1986 [Refereed][Not invited]
  • Chronological study on the torrential channel bed by the age distribution of deposits
    Research bulletins of the College Experiment Forests, Hokkaido University 43 (1) 1 - 26 1986 [Refereed][Not invited]
  • Analysis of storage and transport processes based on age distribution of sediment
    Nakamura, F
    Transactions Jpn. Geomorphological Union 7 (3) 165 - 184 1986 [Refereed][Not invited]
  • 斜面形態区分による侵食微地形の抽出手法.
    中村太士, 新谷 融, 東 三郎
    第96回日本林学会大会発表論文集 597 - 598 1985 [Not refereed][Not invited]
  • Retardation of Debris Movement in Wider Place of River Channel.
    Nakamura,F, Araya,T, Higashi,S
    Proc. International Symposium on Erosion, Debris Flow and Disaster Prevention 127 - 132 1985 [Not refereed][Not invited]
  • 中村 太士
    北海道大学農学部演習林研究報告 北海道大学演習林 42 (3) p525 - 536,図2p 0367-6129 1985 [Refereed][Not invited]
  • 三次元グラフィックスに関する砂防学的研究
    東 三郎, 中村太士, 荻野 厚
    北海道大学農学部演習林研究報告 42 (1) 109 - 132 1985 [Refereed][Not invited]
  • The method to make three dimensional view of land configuration from contour map with micro-computer
    Nakamura, F
    Research bulletins of the College Experiment Forests, Hokkaido University 42 (3) 525 - 536 1985 [Refereed][Not invited]
  • 中村太士, 新谷 融
    砂防学会誌(新砂防) 35 (3) 9 - 16 1983 [Refereed][Not invited]
  • 馬場仁志, 中村太士, 新谷 融
    砂防学会誌(新砂防) 36 (1) 8 - 16 1983 [Refereed][Not invited]

Books etc

  • 北海道 水辺の生き物の不思議
    川井 唯史, 中村 太士 (Editor)
    北海道新聞社 2013/04
  • Panoramic View of the Life Science and Clinical Research Field(2013)
    NAKAMURA Futoshi (Contributor3.6.3 植物生理・生態)
  • 高等学校用 森林科学
    中村 太士 (Editor)
    実教出版株式会社 2013/01
    NAKAMURA Futoshi (Editor)
    講談社 2013/01
  • 北海道の森林(分担:北方森林学会編)
    中村 太士 (Contributor生態系のつながり)
    北海道新聞社 2011
  • 川の蛇行復元−水理・物質循環・生態系からの評価−.
    技報堂出版 2011 
  • 川の蛇行復元-水理・物質循環・生態系からの評価-.
    技報堂出版 2011
  • 日本の河川−標津川、釧路川. 図説「日本の河川」
    中村太士 (Contributor)
    朝倉書店 2010 
  • 日本の河川-標津川、釧路川. 図説「日本の河川」
    朝倉書店 2010
  • 景観生態学の展開.森への働きかけ
    海青社 2010
  • 森林のはたらきを評価する−市民による森づくりに向けて−.
    中村太士, 柿澤宏昭 
    北海道大学出版会 2009 
  • 森林のはたらきを評価する-市民による森づくりに向けて-.
    北海道大学出版会 2009
  • 川の環境目標を考える −川の健康診断−
    中村太士, 辻本哲郎, 天野邦彦 (Supervisor)
    技報堂出版 2008 
  • Gravel-Bed Rivers 6 ? From process understanding to river restoration
    Nakamura, F, Kawaguchi, Y, Nakano, D, Yamada, H (ContributorEcological responses to anthropogenic alterations of gravel-bed rivers in Japan, from floodplain river segments to the microhabitat scale)
    Elsevier Science Ltd 2008 
  • エコロジストの時間(日本環境アセスメント協会編)
    中村太士 (Contributorどうしたら自然再生事業は日本に根づくのか)
    東海大学出版会 2008 
  • Gravel-Bed Rivers 6 – From process understanding to river restoration
    Elsevier Science Ltd 2008
  • 北海道の森林(分担:辻井達一・岡田操・高田雅之編)
    中村 太士 (Contributor川の蛇行化)
    北海道新聞社 2007
  • 北海道の湿原
    中村太士 (Contributor川の蛇行化)
    北海道新聞社 2007 
  • よみがえれ自然−自然再生ガイドライン
    中村太士 (Supervisor)
    環境コミュニケーションズ 2007 
  • Plant Disturbance Ecology
    Academic Press 2007
  • Braided Rivers
    Blackwell 2006
  • 森林の科学−森林生態系科学入門−
    中村太士, 小池孝良 
    朝倉書店 2005 
  • 自然再生−釧路から始まる−
    環境省, 社, 自然環境共生技術協会 (Contributor釧路での実践から得られた教訓)
    ぎょうせい 2004 
  • 砂防用語集
    社)砂防学会 (Contributor生態環境)
    山海堂 2004 
  • Fishes and Forestry Worldwide Watershed Interactions and Management
    Blackwell 2004
  • 新領域土木工学ハンドブック
    池田駿介, 林良嗣, 嘉門雅史, 磯部雅彦, 川島一彦 (Contributor自然・生態システム「森林から河川−物理系と生態系」)
    朝倉書店 2003 
  • 森林の百科
    井上真, 桜井尚武, 鈴木和夫, 富田文一郎, 中静透 (Contributor森林と河川の相互作用)
    朝倉書店 2003 
  • The ecology and management of wood in world rivers
    Gregory, S. V, Boyer, K. L, Gurnell, A. M (Contributor)
    American Fisheries Society 2003 
  • 森林計画学
    木平勇吉 (Contributor1.2森林計画の時空間スケールと社会的背景,2.3森林の機能別保全のサブシステム)
    朝倉書店 2003 
  • 生態学事典
    巖佐庸, 松本忠夫, 菊沢喜八郎 (Contributor)
    共立出版 2003 
  • River Flow 2002
    Bousmar & Zech (Contributor)
    Lisse, Netherlands ; Tokyo : A.A. Balkema, a member of Swets & Zeitlinger 2002 
  • Global perspective in forest conservation and sustainable agriculture
    Takahashi J (Contributor)
    The organizing committee of OASERD 2002 
  • Geomorphic Processes and Riverine Habitat
    Dorava, J. M, Montgomery, D. R, Palcsak, B. B, Fitzpatrick, F. A (Contributor)
    AGU Water Science and Application 2001 
  • 水辺林管理の手引き
    渓畔林研究会 (Contributor水辺林管理の基本理念)
    日本林業調査会 2001 
  • 流域動態の認識とその方法
    北大図書刊行会 2001
  • 水辺域管理−その理論・技術と実践−
    砂防学会編 (Contributor)
    古今書院 2000 
  • 里山を考える101のヒント
    日本林業技術協会 (Contributor渓流と森林)
    東京書籍 2000 
  • 流域一貫−森と川と人のつながり−
    築地書館 1999 
  • 水辺域ポイントブック−これからの管理と保全−
    砂防学会 (Contributor)
    古今書院 1999 
  • 渓流生態砂防学
    東大出版会 1999
  • 流域一貫-森と川と人のつながり-
    築地書館 1999
  • 水辺環境の保全と地形学
    日本地形学連合 (Contributor河川の土砂動態と水辺域の生態学的機能)
    古今書院 1998 
  • 地震による斜面災害−1993〜1994年北海道三大地震から−
    地すべり学会北海道支部 (Contributor南西沖地震−斜面災害と生産土砂の動態−)
    北海道大学図書刊行会 1997 
  • 水辺林の再生と保全に向けて−米国国有林の管理指針と日本の取り組み
    渓畔林研究会 (Contributor「2章 水辺林の生態的機能」「3章 河川地形とともに変化する水辺林の機能」「4章 豊かな水辺林の再生をめざして−日本における取り組み−第1節 北海道における水辺林の管理」)
    日本林業調査会 1997 
  • 森林の百科事典
    太田猛彦, 北村昌美, 熊崎 実, 鈴木和夫, 須藤彰司, 只木良也, 藤森隆郎 (Contributor「景観生態学」 他)
    丸善 1996 
  • 森の木の不思議
    日本林業技術協会 (Contributor年輪は樹木の傷病記録)
    日本林業技術協会 1996 
  • 景相生態学 (ランドスケープ・エコロジー入門)
    朝倉書店 1996

Conference Activities & Talks

  • 講演「生物多様性を地図化することの意義と展望」  [Not invited]
    中村 太士
    第8回GISコミュニティフォーラム/東京  2012/05
  • 生態系評価を地図化する試み  [Not invited]
    中村 太士
    特定非営利活動法人 地球環境カレッジ第112回定例講演会/東京  2012/04
  • パネルディスカッション:生物多様性を意識した今後の河川環境管理とは?  [Not invited]
    中村 太士
    応用生態工学会国際交流委員会 国際シンポジウム 生物多様性を意識した河川環境管理~COP10後の日本と欧州での取り組み~/応用生態工学会国際交流委員会/東京工業大学  2011/06
  • Panel Discussion: International Workshop on Habitatology for Linking Sediment Dynamism and Biodiversity  [Not invited]
    Scientific Research Project on Tagliamento River, NE Italy.  2011/06  (Kyoto, Japan)
  • 講演・自然再生でやるべきこと、やってはいけないこと-釧路湿原や知床の経験から-  [Not invited]
    中村 太士
    アポイ岳の自然再生学習会/アポイ岳再生委員会/様似町  2011/02
  • 基調講演「生態系のつながりと生物多様性:河川生態系に着目して」  [Not invited]
    中村 太士
    環境システム学部フォーラム 水と河川をめぐる多様性/酪農学園大学  2011/02
  • 基調講演「砂礫の移動様式の変化が流域生態系にもたらすインパクト~元気がなくなった日本の河川の現状と課題~」  [Not invited]
    中村 太士
    北海道淡水魚保護フォーラムNo.11in札幌 川底からの河川再生~もうひとつの河野流れ~  2011/01
  • 流域的視点からみた釧路湿原保護の現状と課題  [Not invited]
    第2回大会公開シンポジウム「自然保護区のあり方−人類と生物圏との共生に向けて−」  2011  野生生物保護学会
  • 流域における土地利用変遷と河川環境の変化  [Not invited]
    流域環境保全と市民参加 −市民・行政・研究者のネットワークづくり−  2011  東京農工大学農学部
  • 物質の流れと生物の生息場環境−釧路湿原を対象にして−  [Not invited]
    景観生態学の現状と将来−発展的展望から− 第46回日本生態学会(松本1999)自由式シンポジウム  2011  国際景観生態学会日本支部会
  • 北海道における自然復元の考え方と課題−釧路湿原の保全および標津川再蛇行化計画を事例として−  [Not invited]
    公開シンポジウム「河川の自然復元の現状と課題」  2011  応用生態工学研究会
  • オーガナイザー  [Not invited]
    パネルディスカッション生態分科会:水循環シンポジウム−21世紀の研究課題と展望−  2011  日本学術会議・メカニクス構造研究連絡委員会・水力学、水理学専門委員会・社会環境工学研究連絡委員会・水資源学専門委員会
  • 河川・水辺・湿地の復元 −物質の流れ・攪乱・生息場環境の視点から−  [Not invited]
    第7回応用生態工学会公開シンポジウム『川と川辺のリンケージ:健全な河川生態系を修復するために』  2011  応用生態工学会
  • 自然再生事業において保護区・再生優先区の抽出をいかに実施するか  [Not invited]
    2011  日本景観生態学会
  • 自然再生−地域(region),(catchment),地区(local site)における分析と復元の考え方  [Not invited]
    公開シンポジウム「自然再生をめぐる学術と技術の展望」  2011  日本緑化工学会
  • 北海道の川を蘇らせるには、今何をすべきか  [Not invited]
    兵庫県の河川自然再生コウノトリの舞う郷へ シンポジウム「川の自然再生を考える」日本景観生態学会第1回大会公開シンポジウム景観生態学と戦略的環境アセスメン  2011  兵庫県立人と自然の博物館・兵庫県県土整備部・応用生態工学会:応用生態工学会関連企画
  • 釧路湿原での自然再生:環境と社会・経済とのバランスをいかにとるか  [Not invited]
    兵庫県の河川自然再生コウノトリの舞う郷へ フォーラム「円山川の自然再生に関するフォーラム」  2011  国土交通省近畿地方整備局・兵庫県・豊岡市:応用生態工学会関連企画
  • 釧路湿原流域の現状と課題、そして再生の考え方  [Not invited]
    第7回日本生態学会公開講演会 L4 湿原の自然再生  2011  日本生態学会
  • 自然復元と順応的管理  [Not invited]
    共同利用シンポジウム  2011  東京大学海洋研究所
  • 自然再生−地域、流域、地区における分析と復元の考え方  [Not invited]
    環境修復セミナープログラム  2011  立正大学
  • 自然再生・森林復元の可能性と技法 コーディネーター  [Not invited]
    第116回日本森林学会公開シンポジウム  2011  日本森林学会
  • 地形変化に伴う生物生息場形成と生活史戦略−人為的影響とシステムの再生をめざして  [Not invited]
    創立25周年記念シンポジウム「地形学の新展開」  2011  日本地形学連合
  • 階層的河川環境評価の考え方  [Not invited]
    河川環境目標への科学的アプローチは可能か−考え方と実際−ワークショップ  2011  河川環境目標検討委員会 共催:応用生態工学会
  • 切り下げ(スリットを含む)の必要性と現状  [Not invited]
    渓流・河川横断構造物の切り下げ(スリットを含む)セミナー  2011  応用生態工学札幌・独立行政法人北海道開発土木研究所
  • 陸域・水域エコトーンにおける生物生息場形成と生活史戦略−人為的影響とシステムの再生をめざして−  [Not invited]
    第4回海域・陸域統合管理論セミナー  2011  京都大学フィールド科学教育研究センター
  • 河川環境を流域の視点から考える  [Not invited]
    公開シンポジウム「流域で見る洪水ハザード」  2011  名古屋大学(災害・防災学習カリキュラム開発委員会)
  • パネリスト  [Not invited]
    第2分科会「ふるさとみやぎの自然とひとをつなぐ水〜流域水循環系の健全化〜」  2011  第11回水シンポジウム2006 in みやぎ
  • 応用生態工学が担ってきた研究領域と未知の領域−現状認識と新たな視点の発掘をめざして−  [Not invited]
    応用生態工学の10年とこれから−土木工学と生態学の壁はとりのぞかれたか?  2011  応用生態工学10周年記念東京大会
  • 環境評価・復元の基本的な考え方−地域・流域・地区における診断と治療−  [Not invited]
    北海道の環境と農林水産−次世代への提言−  2011  日本水産学会北海道支部大会
  • 河川生態系を蘇らせる新たな視点  [Not invited]
    東北河川技術研修  2011  国土交通省 東北地方整備局
  • 生物環境をいかに捉えるか-工学と生態学の接点-  [Not invited]
    2011  神戸大学大学院工学研究科
  • 流域一貫~森林管理と流域保全~  [Not invited]
    中村 太士
    講演会/西条市  2010/10
  • 知床世界自然遺産 登録から5年間の歩みと未来  [Not invited]
    中村 太士
    知床世界自然遺産登録5周年記念シンポジウム/横浜ランドマークプラザ  2010/06
  • 「景観・生息場の保全」  [Not invited]
    中村 太士
    国際ワークショップ「生物多様性保全に向けた応用生態工学からのアプローチ」~COP10名古屋に向けて~ 名古屋国際会議場  2010/05
  • 魚の棲める川への自然再生  [Not invited]
    「川の自然生態系と在来魚を守る−知床を含む北海道の現状と将来−」  2010  2007年度魚類学会公開市民講座/北海道・淡水魚保護フォーラム
  • 流域の自然再生を考える  [Not invited]
    2010  応用生態工学会・日本生態学会東北地区会
  • 生態系管理の考え方と実践.  [Not invited]
    「生態系管理を考える」東京農工大学野生動物管理システム 公開シンポジウム  2010  東京農工大学
  • 河川・湿地の自然再生の技術. 「河川・湿地の自然再生の理念と記述」  [Not invited]
    第2回自然再生講習会  2010  日本生態学会
  • 生物環境をいかに捉えるか-工学と生態学の接点-  [Not invited]
    中村 太士
    特別講演 神戸大学工学部市民工学教室  2009/12
  • まっすぐな川・まがった川-蛇行した川の持つ意味  [Not invited]
    中村 太士
    標津川技術検討委員会成果発表会  2009/10
  • River and floodplain restoration in the US and Japan -Current accomplishment and problems,and future directions -/Hokkaido  [Not invited]
    中村 太士
  • 人と川そのつながり~ヤマメ湧く川は今~  [Not invited]
    中村 太士
    シンポジウム/旭川  2009/10
  • 公開シンポジウム 市民参加-理念と方法- 横浜市/丹沢大山自然再生委員会・市民参加研究会  [Not invited]
    中村 太士
  • 択伐は稚幼樹の成長量と生残率を向上させるか?  [Not invited]
    宮久史, 吉田俊也, 野口麻穂子, 安田哲, 中村太士
    日本森林学会  2009/03  京都大学
  • International Symposium on the 4 Major Rivers Ecological Conservation and Restoration/Korea  [Not invited]
    中村 太士
  • エゾアカガエルの陸上ハビタット利用‐夏季と秋季の比較‐  [Not invited]
    永美暢久, 赤坂卓美, 中村太士
    日本生態学会  2009/03  岩手県立大学
  • 北海道北部の択伐が実施された針広混交林における林冠ギャップ動態と稚樹の定着立地特性  [Not invited]
    宮久史, 吉田俊也, 野口麻穂子, 米康充, 小熊宏之, 坂井励, 高橋廣行, 小宮圭示, 小野貴司, 中村太士
    日本生態学会  2009/03
  • 総合環境科学のための野外トレーニングコースに関する国際ワークショップ/北海道大学  [Not invited]
    中村 太士
  • 「森林・水源環境保全・再生に向けて今求められる施策は何か」  [Not invited]
    中村 太士
    第6回水源環境保全・再生かながわ県民フォーラム  2009/02
  • 森と川と海−地球の生態を考える.  [Not invited]
    海浜美化フォーラム2009  2009  NPO法人 北海道海浜美化を進める会主催
  • しべつの森と川と生きものたち.  [Not invited]
    北大・東農大による研究活動報告会− コーディネーター  2009  標津町
  • 渓流環境モニタリングと情報整備.  [Not invited]
    自然環境保全センター公開講座「渓流環境モニタリングと情報整備」講演  2009
  • なぜ、川の周りには森は必要か?  [Not invited]
    別寒辺牛川地域連携講座「森と海をつなぐ川の環境をどう守るか」  2009  京都大学フィールド科学教育センター
  • Variations of fluvial export of large wood and sediment along the precipitation and latitude at the watershed scale  [Not invited]
    Futoshi Nakamura, Jung Il Seo・Alexander, K. Fremier
    American Geophysical Union  2008/12  The Moscone Center West Building, Howard Street, SanFrancisco, California, USA
  • Dynamic processes of large woody debris and their effects on fluvial export at the watershed scale  [Not invited]
    Jung Il Seo, Futoshi Nakamura, Kun Woo Chun
    American Geophysical Union  2008/12  The Moscone Center North Building, Howard Street, SanFrancisco, California, USA
  • 流域圏の防災・環境研究に果たす沿岸域フィールド・スタディの役割と展望  [Not invited]
    撹乱に伴う生物生息場形成と生活史戦略.平成20年度京都大学防災研究所附属流域災害研究センターシンポジウム  2008/11
  • 森林性両生類の繁殖場所選択と繁殖成功  [Not invited]
    永美暢久, 赤坂卓美, 中村太士
    日本森林学会北海道支部会  2008/11  札幌コンベンションセンター
  • 流域の自然再生を考える  [Not invited]
    応用生態工学、日本生態学会東北地区会  2008/11
  • 韓国山林庁基礎研究支援事業(新山地防災事業団)国際シンポジウム  [Not invited]
    中村 太士
  • Canopy gap dynamics and its influences on juvenile recruitments in a mixed forest under a selection system in northern Japan  [Not invited]
    Miya, H, Yoshida, T, Miya, H, Noguchi, M, Yone, Y, Oguma, H, Sakai, R, Takahashi, H, Komiya, K. Nakamura,F
    6th IUFRO 1.05 Workshop of "uneven-aged silviculture"  2008/10  静岡市
  • 「河川の構造と魚類の夏季生息場としての機能−蛇行河川における事例−」  [Not invited]
    永山滋也, 中村太士
    日本陸水学会第73回大会(札幌大会)  2008/10  札幌市
  • Scale-dependent controls on the fluvial export of large wood  [Not invited]
    Futoshi Nakamura
    International Symposium of Innovative Forest Disasters R&D Center  2008/10  Kangwon National University
  • Historical degradation of wetland and lake ecosystems associated with landuse development in Kushiro River catchment, northern Japan  [Not invited]
    Nakamura, F, Ahn Y.S
    The 5th Jpana-Korea-China International Workshop ? Present Earth Surface Processes and Historical Environmental Changes in East Asia  2008/10
  • 新山地防災事業団 国際シンポジウム講演  [Not invited]
    新山地防災事業団 国際シンポジウム  2008/10  韓国
  • 「河川改修に伴う魚類群集とその生息場の時空間変動−リバー・ランドスケープ・ユニットに着目して−」  [Not invited]
    永山滋也, 中村太士
    ELR2008福岡  2008/09  福岡
  • 農地景観において同所的に生息するコウモリ類3種のハビタット選択  [Not invited]
    赤坂卓美, 赤坂宗光, 中村太士
    ELR(日本緑化工学会・日本景観生態学会・応用生態工学会 三学会合同大会  2008/09  福岡
  • 農地帯の森林における樹洞木の分布およびエゾモモンガによる冬期のねぐら選択  [Not invited]
    勝又聖乃, 赤坂卓美, 中村太士
    ELR2008(応用生態工学会、日本景観生態学会、日本緑地工学会三学会合同大会)  2008/09  福岡
  • 広域の資源管理を目的とした植物生態系の種類数−面積曲線によるランドスケープの認識  [Not invited]
    森本淳子, 小野貴司, 中村太士
    ELR2008福岡,  2008/09  福岡
  • 香川県直島における野生ツツジ群落を活かした景観の保全  [Not invited]
    水本絵夢, 森本淳子, 中村太士
    ELR2008福岡  2008/09  福岡
  • Habitat selection of three sympatric Myotis species in agricultural landscape.  [Not invited]
    Akasaka, T, Nakamura, F
    Sustainability on Food, Feed, Fiber, Water, Energy: Science, Technologies, and Global Strategies  2008/06  札幌
  • 流域スケールにおける大型有機物片(倒流木)の生産・滞留過程と流出量の変化  [Not invited]
    徐 正一, 中村太士, 全 槿雨
    日本砂防学会  2008/05  北海道立道民活動センター(かでる2・7)
  • 自然再生に向けた県民参加と協働のあり方を考える.  [Not invited]
    2008  神奈川県自然環境保全センター
  • 北海道の森と川の再生.  [Not invited]
    大学との連携による森林づくり・地域づくりシンポジウム  2008  北海道大学大学院農学研究院、標津町
  • 森林・水源環境保全・再生に向けて今求められる施策は何か.  [Not invited]
    第6回水源環境保全・再生かながわ県民フォーラム「水源地・森林再生の第2ステージに向けて」 パネリスト  2008
  • 川の自然再生−知床世界自然遺産地域と標津川からの報告.  [Not invited]
    第1回河川環境管理財団 北海道事務所研究発表会基調講演  2008
  • 撹乱に伴う生物生息場形成と生活史戦略  [Not invited]
    シンポジウム「流域圏の防災・環境研究に果たす沿岸域フィールド・スタディの役割と展望」  2008  京都大学防災研究所附属流域災害研究センター
  • 大学との連携による森林づくり・地域づくりシンポジウム  [Not invited]
  • 第11回水源地生態研究セミナー  [Not invited]
  • 北海道洞爺湖サミット記念「国際交流森林環境フォーラム」  [Not invited]
  • 自然再生に向けた県民参加と協働のあり方を考える  [Not invited]
  • 森林の機能評価と協働による森づくり  [Not invited]
    中村 太士
    第22回 ニッセイ財団 助成研究ワークショップ/北海道大学  2007/12
  • 自然再生事業ガイドラインの概要  [Not invited]
    中村 太士
    (社)自然環境共生技術協会/公開シンポジウム よみがえれ自然~自然再生事業ガイドライン~ 東京  2007/11
  • Degradation and restoration of rivers and wetlands in Hokkaido, northern Japan  [Not invited]
    Futoshi Nakamura
    International Conference on Landscape and Ecological Engineering Issues and Problems for Environmental Restoration 2007  2007/11  Seoul National University
  • 魚の棲める川への自然再生.「川の自然生態系と在来魚を守る−知床を含む北海道の現状と将来−」  [Not invited]
    2007年度魚類学会公開市民講座/北海道・淡水魚保護フォーラム  2007/10
  • Rapid shrinkage of Kushiro Mire, the largest mire in Japan, due to increased sedimentation associated with land-use development in the catchment  [Not invited]
    Futoshi Nakamura
    GLP Symposium on "Impacts of Global Change on Vegetation and Cycling of Materials in Ecosystems"  2007/02
  • 自然再生事業における住民参加 −釧路湿原の事例を中心に−  [Not invited]
    (社)日本環境アセスメント協会第2回セミナー  2007
  • 地形変化に伴う生物生息場形成と生活史戦略  [Not invited]
    「河川工作物が生物生息環境に与える影響と課題」(講演)  2007  (財)北海道河川防災研究センター
  • 森と川と海、そして人のつながり  [Not invited]
    矢作川「川会議」  2007
  • 国土環境保全における治山の役割−過去、現在、そして未来−  [Not invited]
    「北海道民有林治山事業60周年記念講演会」  2007  (社)北海道治山林道協会
  • 北の大地での自然との共生  [Not invited]
    損保ジャパン札幌コールセンター開設記念「市民のための環境公開講座」(パネリスト)  2007  損保ジャパン
  • 自然を復元できるか  [Not invited]
    平成19年度 北海道大学公開講座「くらしを創る−安全と安心の科学」  2007
  • 川の自然再生技術に関する発展の方向性と壁.  [Not invited]
    2007  NPO法人 北海道魚道研究会
  • 自然再生ガイドラインの概要.  [Not invited]
    2007  (社)自然環境共生技術協会(NECTA)
  • 森林の機能評価と協働による森づくり.  [Not invited]
    (財)日本生命財団 助成研究ワークショップ  2007  (財)日本生命財団
  • NPO法人 北海道魚道研究会  [Not invited]
  • 平成19年度 北海道大学公開講座「くらしを創る−安全と安心の科学」  [Not invited]
  • 損保ジャパン札幌コールセンター開設記念「市民のための環境公開講座」(パネリスト)損保ジャパン  [Not invited]
  • 矢作川「川会議」  [Not invited]
  • 北海道民有林治山事業60周年記念講演会((社)北海道治山林道協会)  [Not invited]
  • 「河川工作物が生物生息環境に与える影響と課題」(講演)((財)北海道河川防災研究センター)  [Not invited]
  • (社)日本環境アセスメント協会第2回セミナー  [Not invited]
  • 環境評価・復元の基本的な考え方−地域・流域・地区における診断と治療−  [Not invited]
    日本水産学会北海道支部  2006/12
  • 応用生態工学が担ってきた研究領域と未知の領域−現状認識と新たな視点の発掘をめざして−  [Not invited]
    応用生態工学会  2006/10  東京
  • UNITAR/KIWC WORKSHOP ON BIODIVERSITY Ecosystem,Water and Biodiversity Organized jointly with the Kushiro International Wetland Centre(KIWC)  [Not invited]
    中村 太士
    UNITED NATIONS INSTITUTE FOR TRAINING AND RESEACH Hiroshima Office for Asia and the Pacific  2006/08
  • ふるさとみやぎの自然とひとをつなぐ水〜流域水循環系の健全化〜  [Not invited]
    (社)土木学会水工学委員会、国土交通省東北地方整備局、宮城県、  2006/08
  • 本来の川と取り戻すために−自然再生を拓く河床低下対策−  [Not invited]
    応用生態工学札幌,独立行政法人寒地土木研究所  2006/07
  • 河川環境を流域の視点から考える  [Not invited]
    災害・防災学習カリキュラム開発委員会  2006/04
  • 森林と河川の相互作用−過去と現在、そして再生へ向けた未来への展望  [Not invited]
    河川生態系連続講演会「流域生態系を育む河川ネットワーク」  2006  特定非営利活動法人 日本国際湿地保全連合
  • 21世紀のパイロットフォレストのあり方を探る〜カラマツ資源の持続的利用と環境との調和〜  [Not invited]
    パイロットフォレスト造成50周年記念シンポジウム(パネリスト)  2006  北海道森林管理局
  • パイロットフォレスト造成50周年記念シンポジウム(北海道森林管理局)  [Not invited]
  • 環境科学研究所生物研究連絡会((財)電力中央研究所)  [Not invited]
  • 河川生態系連続講演会「流域生態系を育む河川ネットワーク」特定非営利活動法人 日本国際湿地保全連合  [Not invited]
  • River alteration and its ecological consequences from reach to catchment scale  [Not invited]
    Futoshi Nakamura
    Gravel-Bed Rivers 6 ? From process understanding to river restoration  2005/09  AUSTRIA
  • 切り下げ(スリットを含む)の必要性と現状  [Not invited]
    応用生態工学札幌・独立行政法人北海道開発土木研究所  2005/08
  • 階層的河川環境評価の考え方  [Not invited]
    河川環境目標検討委員会 共催:応用生態工学会  2005/06
  • 地形変化に伴う生物生息場形成と生活史戦略−人為的影響とシステムの再生をめざして  [Not invited]
    日本地形学連合  2005/05
  • 自然再生・森林復元の可能性と技法  [Not invited]
    日本森林学会  2005/03
  • 自然再生−地域、流域、地区における分析と復元の考え方  [Not invited]
    立正大学環境修復セミナープログラム  2005/03
  • Current environmental problems and restoration efforts in the Kushiro Mire, the largest wetland in Japan.  [Not invited]
    Nakamura, F
    2005 World Wetlands Day Ceremony and Symposium.  2005/02  Changnyeong-gun, Korea
  • 自然再生事業と阿蘇草原再生  [Not invited]
    阿蘇くじゅう国立公園指定70周年記念−阿蘇草原再生シンポジウム  2005  環境省
  • 第6回「森林と河川の相互作用−過去と現在、そして再生へ向けた未来への展望−  [Not invited]
    河川生態系連続講演会 流域生態系を育む河川ネットワーク  2005  特定非営利活動法人 日本国際湿地保全連合
  • 階層的河川環境評価の考え方  [Not invited]
    河川環境目標への科学的アプローチは可能か−考え方と実際−  2005  河川環境目標検討委員会(国土交通省)
  • 河川環境目標検討委員会(国土交通省)  [Not invited]
  • 河川生態系連続講演会 流域生態系を育む河川ネットワーク(特定非営利活動法人日本国際湿地保全連合)  [Not invited]
  • 阿蘇くじゅう国立公園指定70周年記念−阿蘇草原再生シンポジウム(環境省)  [Not invited]
  • 自然復元と順応的管理  [Not invited]
    京大学海洋研究所 共同利用シンポジウム  2004/11
  • 釧路湿原流域の現状と課題、そして再生の考え方  [Not invited]
    日本生態学会  2004/08  釧路
  • 釧路湿原での自然再生  [Not invited]
    国土交通省近畿地方整備局・兵庫県・豊岡市:応用生態工学会関連企画  2004/08
  • 北海道の川を蘇らせるには、今何をすべきか  [Not invited]
    兵庫県立人と自然の博物館・兵庫県県土整備部・応用生態工学会:応用生態工学会関連企画  2004/08
  • 森林と河川の相互作用−物理化学系ならびに生態系の視点から−  [Not invited]
    土木学会 水工学委員会・海岸工学委員会  2004/07
  • 自然再生−地域(region),流域(catchment),地区(local site)における分析と修復の考え方  [Not invited]
    日本学術会議  2004/06  東京
  • 自然再生事業において保護区・再生優先区の抽出をいかに実施するか  [Not invited]
    日本景観生態学会  2004/03  広島
  • 自然再生の課題と展望  [Not invited]
    第2回「川の自然再生」セミナー  2004  財団法人リバーフロント整備センター
  • 自然再生事業の評価について  [Not invited]
    第1回シンポジウム 自然と共生する社会づくり −自然再生事業の実践的課題と展望−(パネルディスカッション)  2004  社団法人自然環境共生技術協会
  • 自然再生技術に関する発展の方向性と壁  [Not invited]
    第491回建設技術講習会テキスト(環境問題)  2004  社団法人全日本建設技術協会・北海道
  • 川のダイナミクスと連続性−ダム下流の環境変化に関連して−  [Not invited]
    コーディネーター第7回水源地生態研究セミナー  2004  ダム水源地環境整備センター
  • 川がもたらす湿原の環境  [Not invited]
    「ふれあい自然ワークショップ」環境講演会  2004  浜中町教育委員会
  • 森林と河川の相互作用 −物理化学系ならびに生態系の視点から−  [Not invited]
    2004年度(第40回)水工学に関する夏期研修会講義  2004  土木学会 水工学委員会・海岸工学委員会
  • 「ふれあい自然ワークショップ」環境講演会(浜中町教育委員会)  [Not invited]
  • 第491回建設技術講習会テキスト(環境問題):(社団法人全日本建設技術協会)  [Not invited]
  • 第1回シンポジウム 自然と共生する社会づくり −自然再生事業の実践的課題と展望−((社)自然環境共生技術協会)  [Not invited]
  • 第7回水源地生態研究セミナー(ダム水源地環境整備センター)  [Not invited]
  • 第2回「川の自然再生」セミナー(財団法人リバーフロント整備センター)  [Not invited]
  • 河川および湿原再生の原則と適用−釧路湿原ならびに標津川の再生事業から学んだ教訓−  [Not invited]
    第47回日本水環境学会セミナー  2003/11
  • 河川・水辺・湿地の復元−物質の流れ・撹乱・生息場環境の視点から−  [Not invited]
    応用生態工学会  2003/10  北九州市
  • Catchment management issues in Japan. "Sediment management in river systems: Basin scale approaches to predicting land to ocean responses"  [Not invited]
    Futoshi Nakamura
    International Workshop 12-14th February 2003  2003/02  Gisborne, Waipaoa River Basin,New Zealand
  • 森林の公益的機能の限界と可能性:森林の公益的機能の限界と可能性  [Not invited]
    2003  社団法人 北海道造林協会
  • 自然再生事業の調査計画論 −目標と評価の視点から−:自然環境共生技術フォーラム講演録  [Not invited]
    自然環境共生技術フォーラム  2003
  • 釧路湿原の現状と流域保全・再生への提言  [Not invited]
    釧路湿原自然再生大会  2003  釧路湿原自然再生大会実行委員会
  • 川の自然再生の考え方−その原則と適用−:「川の自然再生」セミナーテキスト::  [Not invited]
    2003  財団法人リバーフロント整備センター
  • 森と川の変貌と自然再生  [Not invited]
    全国湖沼河川養殖研究会第76回大会福井県(話題提供)  2003
  • 河川および湿原再生の原則と適用 −釧路湿原ならびに標津川の再生事業から学んだ教訓−  [Not invited]
    第47回日本水環境学会セミナー 自然再生推進・生態系保全ーその実践ならびに評価手法を考えるー  2003  社団法人日本水環境学会
  • 全国湖沼河川養殖研究会第76回大会(福井県)  [Not invited]
  • 「川の自然再生」セミナーテキスト(財団法人リバーフロント整備センター)  [Not invited]
  • 水循環シンポジウム−21世紀の研究課題と展望−(日本学術会議・メカニクス構造研究連絡委員会・水力学、水理学専門委員会・社会環境工学研究連絡委員会・水資源学専門委員会)  [Not invited]
  • 釧路湿原自然再生大会(釧路湿原自然再生大会実行委員会)  [Not invited]
  • 自然環境共生技術フォーラム講演録(自然環境共生技術フォーラム)  [Not invited]
  • 森林の公益的機能の限界と可能性(社団法人北海道造林協会)  [Not invited]
  • The nature restoration project in Kushiro Mire and Shibetsu River  [Not invited]
    Nakamura, F
    International symposium on renaturalization of a river basin by eco-compatible and adaptive management  2002/09  Tokyo
  • 釧路湿原及び標津川流域における再生事業  [Not invited]
    川の自然再生シンポジウム実行委員会  2002/09
  • Decline of ecological function of riparian zone in association with pasture development in Japan  [Not invited]
    Futoshi Nakamura
    The Organizing Committee of OASERD・ Obihiro University of Agriculture and Veterinary Medicine  2002/04  Obihiro,Japan
  • Effects of Dams and Channel Works on Riverine Habitat in Mountainous Streams in Northern Japan  [Not invited]
    Nakamura, F
    United Nations University International Symposium on Conservation of Mountain Ecosystems  2002/02  Tokyo
  • 社会全体で支える森林・流域管理  [Not invited]
    かながわ発「水源環境」シンポジウム−水源環境保全の施策と税制を考える全国シンポジウム−(コメンテーター)  2002  神奈川県
  • 自然再生事業と順応的管理:自然と共生する豊かな生活空間をめざしてX 平成14年度環境セミナー講演録  [Not invited]
    第3回環境セミナー  2002  北海道開発局:
  • 釧路湿原及び標津川流域における再生事業  [Not invited]
    国際シンポジウム 川の自然再生講演録 第3回世界水フォーラムに向けて  2002  「川の自然再生シンポジウム」実行委員会
  • 自然と共生する豊かな生活空間をめざしてX 平成14年度環境セミナー講演録(北海道開発局:第3回環境セミナー)  [Not invited]
  • 社会全体で支える森林・流域管理:かながわ発「水源環境」シンポジウム−水源環境保全の施策と税制を考える全国シンポジウム−(神奈川県)  [Not invited]
  • Ecological functions of riparian zone - Presentation of required buffer width in Japan -.  [Not invited]
    Nakamura, F
    The International Workshop on efficiency of purification processes in riparian zones. Their design and planning in agricultural watersheds.  2001/11  Kushiro
  • 北海道における自然復元の考え方と課題−釧路湿原の保全および標津川再蛇行化計画を事例として−  [Not invited]
    応用生態工学研究会  2001/09  東京
  • Fluvial Geomorphology and Environments (Session theme).  [Not invited]
    Futoshi Nakamura
    Fifth International Conference on Geomorphology  2001/09
  • 北海道渡島地方小渓流河川における実験的管理の試み−特徴ある魚類群集の保全−  [Not invited]
    佐川志朗, 中村太士, 妹尾優二, 木村明彦, 三沢勝也, 入江潔, 藤田真人, 渡辺敏也
    応用生態工学研究会  2001/09  東京
  • The effects of dams on the regeneration process of riparian tree species.  [Not invited]
    Nakamura, F
    Fifth International Conference on Geomorphology  2001/09
  • Interaction between fluvial geomorphology and woody debris in different geological setting in Japanese streams.  [Not invited]
    Mishima, Y, Nakamura, F
    Fifth International Conference on Geomorphology.  2001/09
  • パッカー法を用いた砂礫河床における透水係数の測定  [Not invited]
    山田浩之, 中村太士, 渡邊康玄, 村上まり恵, 野上毅
    応用生態工学研究会  2001/09  東京
  • Interactions between geomorphic and ecological processes and riverine habitat (Symposium theme).  [Not invited]
    Futoshi Nakamura
    Fifth International Conference on Geomorphology  2001/09
  • 真駒内川における魚類の生息環境に関する実験的管理の実践  [Not invited]
    加村邦茂, 渡辺恵三, 中村太士, 渡邊康玄, 野上毅, 土屋進, 岩瀬晴夫
    応用生態工学研究会  2001/09  東京
  • Measuring hydraulic permeability in a streambed using Packer test.  [Not invited]
    Yamada, H, Nakamura, F, Murakami, M. Nogami, T, Watanabe, Y
    Fifth International Conference on Geomorphology  2001/09
  • 河川環境および構造物の評価手法に関する景観生態学的研究  [Not invited]
    第4回水源地生態研究セミナー  2001  財団法人ダム水源地環境整備センター
  • 水源地生態研究会議の成果の活用−影響の予測・評価、保全対策への活用を考える−  [Not invited]
    第4回水源地生態研究セミナー(パネルディスカッション)  2001  財団法人ダム水源地環境整備センター
  • 川の自然再生 その目的と評価  [Not invited]
    国際シンポジウム川の自然再生 日本の、世界の、川が変わる(コーディネーター)  2001  国土交通省・財団法人日本生態系協会・財団法人北海道河川防災研究センター
  • 現地実験をベースにした順応的管理の構想と実践  [Not invited]
    第9回自然共生河川研究会  2001  財団法人リバーフロント整備センター・財団法人ダム水源地環境整備センター
  • 国際シンポジウム川の自然再生 日本の、世界の、川が変わる(国土交通省・財団法人日本生態系協会・財団法人北海道河川防災研究センター)  [Not invited]
  • 第4回水源地生態研究セミナー(財団法人ダム水源地環境整備センター)  [Not invited]
  • 第9回自然共生河川研究会(財団法人リバーフロント整備センター・財団法人ダム水源地環境整備センター)  [Not invited]
  • Dynamics of wood in rivers in the context of ecological disturbance  [Not invited]
    Nakamura, F
    First International conference on wood in world rivers  2000/10
  • 河畔林という生態環境  [Not invited]
    第38回日本水環境学会セミナー 「水辺の生態環境の保全と修復」  2000  社団法人日本水環境学会
  • 物質の流れと生物の生息場環境−釧路湿原を対象にして−  [Not invited]
    日本生態学会  1999/03
  • 流域一貫/森と川と人のつながりを求めて  [Not invited]
    平成11年度公開河川講座−川の未来とパートナーシップによる川づくりを考える−  1999  建設省徳島工事事務所:徳島県
  • 河川法改正/河川管理の新しい方向を考える  [Not invited]
    平成11年度公開河川講座−川の未来とパートナーシップによる川づくりを考える−(パネルディスカッション)  1999  建設省徳島工事事務所:徳島県
  • 平成11年度公開河川講座−川の未来とパートナーシップによる川づくりを考える−(建設省徳島工事事務所・徳島県)  [Not invited]
  • Application of landscape ecology to watershed management ? How we can restore ecological functions in fragmented landscape-  [Not invited]
    Nakamura, F
    The Korean Network for Landscape Ecology  1998/01
  • 水辺林の更新動態と生態学的機能−これまでの研究紹介と今後の展望  [Not invited]
    第1回水源地生態研究セミナー講演集  1998  財団法人ダム水源地環境整備センター
  • 第1回水源地生態研究セミナー講演集(財団法人ダム水源地環境整備センター)  [Not invited]
  • 流域における土地利用変遷と河川環境の変化  [Not invited]
    東京農工大学農学部  1997/11
  • 水辺林の生態的機能とその管理:生物機能関係資料集 ?12  [Not invited]
    平成9年度バイオコスモス計画テーマ別研究会 森と川と海と魚  1997  水産庁日本海区水産研究所・農林水産技術会議事務局・社団法人農林水産技術情報協会:
  • 河川の土砂動態と水辺域の生態的保全  [Not invited]
    第3回地形工学セミナー 地形学から工学への提言  1997  日本地形学連合
  • 平成9年度バイオコスモス計画テーマ別研究会 森と川と海と魚(水産庁日本海区水産研究所・農林水産技術会議事務局・社団法人農林水産技術情報協会)  [Not invited]
  • 水辺林の更新動態と河川生態系における役割  [Not invited]
    (社)砂防学会50周年記念シンポジウム  1997  (社)砂防学会50周年記念シンポジウム実行委員会
  • 域的視点からみた釧路湿原保護の現状と課題  [Not invited]
    野生生物保護学会  1996/10
  • 緑の砂防 −流域における土砂動態と河畔域の保全  [Not invited]
    1995年度(第31回)水工学に関する夏期研修会  1995  土木学会水理委員会
  • 森林科学の分野から  [Not invited]
    演習林フォーラム−21世紀を目指して−  1994  北海道大学農学部
  • 演習林フォーラム−21世紀を目指して−(北海道大学農学部長)  [Not invited]
  • 河川の生態環境の評価・保全に関わる研究の現状−生態系管理の視点から−:2006/6/22: 環境科学研究所生物研究連絡会((財)電力中央研究所)1997年11月19・20日:岐阜県:Session?「河川における自然環境の回復と保全」  [Not invited]
  • 流域の土地利用と河川環境のつながり−水辺域の構造と機能の回復をめざして−  [Not invited]
  • Quantitative assessment of biodiversity loss in river/stream environment in Japan.  [Not invited]
    Asia Pacific Biodiversity Observation Network  (Tokyo, Japan).
  • Connectivity and dynamics of river and riparian landscape - Cascading effects of human impacts in Japan -.  [Not invited]
    River Corridor Restoration Conference 11.  (Ascona, Switzerland).
  • Shifting mosaic in maintaining river-floodplain ecosystem and its degradation in Japan.  [Not invited]
    International Workshop on Ecosystem-Science & -Engineering Approach toward Conservation of Biodiversity.  2010 (Nagoya, Japan).
  • Restoration of the fish and invertebrate habitat: The re-meandering project of a large river in northern Japan.  [Not invited]
    94th Ecological Society of America annual meeting,  (Albuquerque, New Mexico, USA)
  • Restoration strategies for rivers, floodplains and wetlands in Kushiro Mire and Shibetsu River, northern Japan.  [Not invited]
    International Symposium on the 4 Major Rivers Ecological Conservation and Restoration.  (International Convention Center (Millennium), Sang Myung University, Seoul, Korea)
  • Introduction of JICA training course regarding watershed ecosystem management.  [Not invited]
    International Workshop on the Planning on Field Training Course for the Integrated Environmental Sciences.  (Faculty of Environmental Earth Science, Hokkaido University, Japan)
  • Historical degradation of wetland and lake ecosystems associated with landuse development in Kushiro River catchment, northern Japan.  [Not invited]
    The 5th Japan-Korea-China International Workshop ? Present Earth Surface Processes and Historical Environmental Changes in East Asia.  (Hakodate, Japan)
  • Scale-dependent controls on the fluvial export of large wood  [Not invited]
    International Symposium of Innovative Forest Disasters R&D Center ? Current status and future issues in innovative forest disasters control  (Kangwon National University, College of Forest & Environmental Sciences, Korea)
  • Degradation and restoration of rivers and wetlands in Hokkaido, northern Japan  [Not invited]
    International Conference on Landscape and Ecological Engineering Issues and Problems for Environmental Restoration 2007.  KumRyong Academy House, Seoul National University, Korea
  • Rapid shrinkage of Kushiro Mire, the largest mire in Japan, due to increased sedimentation associated with land-use development in the catchment  [Not invited]
    GLP Symposium on "Impacts of Global Change on Vegetation and Cycling of Materials in Ecosystems"  Hokkaido University, Sapporo, Japan
  • River alteration and its ecological consequences from reach?to catchment scale  [Not invited]
    Gravel-Bed Rivers 6 ? From process understanding to river restoration.  St. Jakob, Austria
  • Current environmental problems and restoration efforts in the Kushiro Mire, the largest wetland in Japan.  [Not invited]
    .2005 World Wetlands Day Ceremony and Symposium.  Changnyeong-gun, Korea
  • Catchment management issues in Japan. "Sediment management in river systems: Basin scale approaches to predicting land to ocean responses"  [Not invited]
    International Workshop  Gisborne, Waipaoa River Basin, New Zealand
  • The nature restoration project in Kushiro Mire  [Not invited]
    International symposium on river restoration.  Tokyo, Japan
  • Effects of dams and channel works on riverine habitat in mountainous streams  [Not invited]
    UNU International Symposium on Conservation of Mountain Ecosystems.  Tokyo, Japan
  • Ecological Functions of Riparian Zone -Presentation of required buffer width in Japan-  [Not invited]
    Proceedings of the International Workshop on Efficiency of Purification Processes in Riparian Buffer Zones Their Design and Planning in Agricultural Watersheds:  Organizing Committee for International Workshop of Riparian Buffer zones, Kushiro, Japan
  • Dynamics of wood in rivers in the context of ecological disturbance  [Not invited]
    First International conference on wood in world rivers.  Oregon, USA
  • Application of landscape ecology to watershed management ? How we can restore ecological functions in fragmented landscape-  [Not invited]
    Landscape Ecology: Principle, Concept and Application  The Korean Network for Landscape Ecology, Seoul, Korea
  • Decline of ecological function of riparian zone in association with pasture development in Japan: International symposium on global perspective in forest conservation and sustainable agriculture.  [Not invited]
    The Organizing Committee of OASERD・  Obihiro University of Agriculture and Veterinary Medicine, 2002 Obihiro, Japan


  • 大学との連携による森林づくり・地域づくりシンポジウム
  • 第11回水源地生態研究セミナー
  • 北海道洞爺湖サミット記念「国際交流森林環境フォーラム」
  • 自然再生に向けた県民参加と協働のあり方を考える
  • NPO法人 北海道魚道研究会
  • 平成19年度 北海道大学公開講座「くらしを創る-安全と安心の科学」
  • 損保ジャパン札幌コールセンター開設記念「市民のための環境公開講座」(パネリスト)損保ジャパン
  • 矢作川「川会議」
  • 北海道民有林治山事業60周年記念講演会((社)北海道治山林道協会)
  • 「河川工作物が生物生息環境に与える影響と課題」(講演)((財)北海道河川防災研究センター)
  • (社)日本環境アセスメント協会第2回セミナー
  • パイロットフォレスト造成50周年記念シンポジウム(北海道森林管理局)
  • 環境科学研究所生物研究連絡会((財)電力中央研究所)
  • 河川生態系連続講演会「流域生態系を育む河川ネットワーク」特定非営利活動法人 日本国際湿地保全連合
  • 河川環境目標検討委員会(国土交通省)
  • 河川生態系連続講演会 流域生態系を育む河川ネットワーク(特定非営利活動法人日本国際湿地保全連合)
  • 阿蘇くじゅう国立公園指定70周年記念-阿蘇草原再生シンポジウム(環境省)
  • 「ふれあい自然ワークショップ」環境講演会(浜中町教育委員会)
  • 第491回建設技術講習会テキスト(環境問題):(社団法人全日本建設技術協会)
  • 第1回シンポジウム 自然と共生する社会づくり -自然再生事業の実践的課題と展望-((社)自然環境共生技術協会)
  • 第7回水源地生態研究セミナー(ダム水源地環境整備センター)
  • 第2回「川の自然再生」セミナー(財団法人リバーフロント整備センター)
  • 全国湖沼河川養殖研究会第76回大会(福井県)
  • 「川の自然再生」セミナーテキスト(財団法人リバーフロント整備センター)
  • 水循環シンポジウム-21世紀の研究課題と展望-(日本学術会議・メカニクス構造研究連絡委員会・水力学、水理学専門委員会・社会環境工学研究連絡委員会・水資源学専門委員会)
  • 釧路湿原自然再生大会(釧路湿原自然再生大会実行委員会)
  • 自然環境共生技術フォーラム講演録(自然環境共生技術フォーラム)
  • 釧路湿原自然再生大会(釧路湿原自然再生大会実行委員会)
  • 森林の公益的機能の限界と可能性(社団法人北海道造林協会)
  • 自然と共生する豊かな生活空間をめざしてX 平成14年度環境セミナー講演録(北海道開発局:第3回環境セミナー)
  • 社会全体で支える森林・流域管理:かながわ発「水源環境」シンポジウム-水源環境保全の施策と税制を考える全国シンポジウム-(神奈川県)
  • 国際シンポジウム川の自然再生 日本の、世界の、川が変わる(国土交通省・財団法人日本生態系協会・財団法人北海道河川防災研究センター)
  • 第4回水源地生態研究セミナー(財団法人ダム水源地環境整備センター)
  • 第4回水源地生態研究セミナー(財団法人ダム水源地環境整備センター)
  • 第9回自然共生河川研究会(財団法人リバーフロント整備センター・財団法人ダム水源地環境整備センター)
  • 平成11年度公開河川講座-川の未来とパートナーシップによる川づくりを考える-(建設省徳島工事事務所・徳島県)
  • 平成11年度公開河川講座-川の未来とパートナーシップによる川づくりを考える-(建設省徳島工事事務所・徳島県)
  • 第1回水源地生態研究セミナー講演集(財団法人ダム水源地環境整備センター)
  • 平成9年度バイオコスモス計画テーマ別研究会 森と川と海と魚(水産庁日本海区水産研究所・農林水産技術会議事務局・社団法人農林水産技術情報協会)
  • 演習林フォーラム-21世紀を目指して-(北海道大学農学部長)


  • An assessment of river environment by physical characteristcs (2) Verification of the validity of the assessment results using biological community data
    Ecology and civil engineering  13-  9  -23  2010  [Not refereed][Not invited]
  • Evaluation on functions of soil and water conservation by Hokkaido's original measures in Uyoro watershed in Shiraoi, Hokkaido
    Landscape ecology and management  13-  (1)  2,113-121  2009  [Not refereed][Not invited]
  • An assessment of river environment by physical characters - Evaluation by the degree of departure from reference condition
    Ecol. Civil. Eng.  11-  (2)  133  -152  2008  [Not refereed][Not invited]

Awards & Honors

  • 2018/04 内閣府 紫綬褒章
    受賞者: 中村 太士
  • 2018/02 北海道 北海道科学技術賞
    受賞者: 中村 太士
  • 2017/04 読売新聞社 読売農学賞
    受賞者: 中村 太士
  • 2017/04 日本農学会 日本農学賞
    受賞者: 中村 太士
  • 2013/03 北海道大学 研究総長賞
    受賞者: 中村 太士
  • 2012/04 内閣府 平成24年(第6回)みどりの学術賞
    受賞者: 中村 太士
  • 2011/03 財団法人 尾瀬保護財団 第14回 尾瀬賞
    受賞者: 中村 太士
  • 2009/07 日本生態学会 第15回生態学琵琶湖賞
    受賞者: 中村 太士
  • 2005/03 2005年度 日本森林学会賞

Research Grants & Projects

  • 文部科学省:科学研究費補助金(基盤研究(A))
    Date (from‐to) : 2012 -2012 
    Author : 中村 太士
  • Ministry of Education, Culture, Sports, Science and Technology:Grants-in-Aid for Scientific Research(基盤研究(A))
    Date (from‐to) : 2007 -2010 
    Author : Futoshi NAKAMURA, Yukihiro MORIMOTO, Yoshihiro NATUHARA, Mahito KAMADA, Tatsuaki KOBAYASHI, Shozo SHIBATA, Masahide YUMA, Yasushi SHOJI, Junko MORIMOTO
    We developed methodology of ecosystem evaluations regarding forests, rivers and agricultural lands. Also, we examined connectivity and historical changes of habitat mosaics and roles of biological legacies such as large wood in recovering processes of vegetation and stream biota. Fishes, invertebrates, plants, amphibians, mussels and mammals were selected as indicator species to evaluate restoration project based upon the results of monitoring and experiment. As for the economical and social aspects, restoration projects were analyzed, and social acceptance and future dimension were discussed.
  • 流域(森林・河川・湿地・氾濫原)における自然再生の理論と技術の構築
    Date (from‐to) : 1997

Social Contribution

Social Contribution


  • 土木学会
  • 日本景観生態学会
  • 応用生態工学
  • 新砂防(砂防学会誌)
  • 地形(日本地形学連合学会誌)
  • 日本森林学会誌
  • 日本生態学会誌
  • Water Resources Research
  • River Research and Applications
  • Plant Species Biology
  • Plant Ecology
  • Landscape and Ecological Engineering
  • Journal of Vegetation Science
  • Journal of Environmental Management
  • Journal of Applied Ecology
  • Hydrological Processes
  • Geomorphology
  • Forest Ecology and Management
  • Environmental Management
  • Ecological Research
  • Ecological Monographs
  • Ecological Applications
  • Earth Surface Processes and Landforms
  • Canadian Journal of Forest Research
  • Biodiversity and Conservation
  • Aquatic Sciences

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